Commit | Line | Data |
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2f53e904 | 1 | /* Framework for configuring and reading PHY devices |
00db8189 AF |
2 | * Based on code in sungem_phy.c and gianfar_phy.c |
3 | * | |
4 | * Author: Andy Fleming | |
5 | * | |
6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
0ac49527 | 7 | * Copyright (c) 2006, 2007 Maciej W. Rozycki |
00db8189 AF |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | */ | |
8d242488 JP |
15 | |
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
17 | ||
00db8189 | 18 | #include <linux/kernel.h> |
00db8189 AF |
19 | #include <linux/string.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/unistd.h> | |
00db8189 | 22 | #include <linux/interrupt.h> |
00db8189 AF |
23 | #include <linux/delay.h> |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/skbuff.h> | |
00db8189 AF |
27 | #include <linux/mm.h> |
28 | #include <linux/module.h> | |
00db8189 AF |
29 | #include <linux/mii.h> |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/phy.h> | |
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 | ||
54da5a8b GR |
238 | /** |
239 | * phy_check_valid - check if there is a valid PHY setting which matches | |
240 | * speed, duplex, and feature mask | |
241 | * @speed: speed to match | |
242 | * @duplex: duplex to match | |
243 | * @features: A mask of the valid settings | |
244 | * | |
245 | * Description: Returns true if there is a valid setting, false otherwise. | |
246 | */ | |
247 | static inline bool phy_check_valid(int speed, int duplex, u32 features) | |
248 | { | |
249 | unsigned int idx; | |
250 | ||
251 | idx = phy_find_valid(phy_find_setting(speed, duplex), features); | |
252 | ||
253 | return settings[idx].speed == speed && settings[idx].duplex == duplex && | |
254 | (settings[idx].setting & features); | |
255 | } | |
256 | ||
b3df0da8 RD |
257 | /** |
258 | * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex | |
259 | * @phydev: the target phy_device struct | |
00db8189 | 260 | * |
b3df0da8 | 261 | * Description: Make sure the PHY is set to supported speeds and |
00db8189 | 262 | * duplexes. Drop down by one in this order: 1000/FULL, |
b3df0da8 | 263 | * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. |
00db8189 | 264 | */ |
89ff05ec | 265 | static void phy_sanitize_settings(struct phy_device *phydev) |
00db8189 AF |
266 | { |
267 | u32 features = phydev->supported; | |
4ae6e50c | 268 | unsigned int idx; |
00db8189 AF |
269 | |
270 | /* Sanitize settings based on PHY capabilities */ | |
271 | if ((features & SUPPORTED_Autoneg) == 0) | |
163642a2 | 272 | phydev->autoneg = AUTONEG_DISABLE; |
00db8189 AF |
273 | |
274 | idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex), | |
275 | features); | |
276 | ||
277 | phydev->speed = settings[idx].speed; | |
278 | phydev->duplex = settings[idx].duplex; | |
279 | } | |
00db8189 | 280 | |
b3df0da8 RD |
281 | /** |
282 | * phy_ethtool_sset - generic ethtool sset function, handles all the details | |
283 | * @phydev: target phy_device struct | |
284 | * @cmd: ethtool_cmd | |
00db8189 AF |
285 | * |
286 | * A few notes about parameter checking: | |
287 | * - We don't set port or transceiver, so we don't care what they | |
288 | * were set to. | |
289 | * - phy_start_aneg() will make sure forced settings are sane, and | |
290 | * choose the next best ones from the ones selected, so we don't | |
b3df0da8 | 291 | * care if ethtool tries to give us bad values. |
00db8189 AF |
292 | */ |
293 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
294 | { | |
25db0338 DD |
295 | u32 speed = ethtool_cmd_speed(cmd); |
296 | ||
00db8189 AF |
297 | if (cmd->phy_address != phydev->addr) |
298 | return -EINVAL; | |
299 | ||
2f53e904 | 300 | /* We make sure that we don't pass unsupported values in to the PHY */ |
00db8189 AF |
301 | cmd->advertising &= phydev->supported; |
302 | ||
303 | /* Verify the settings we care about. */ | |
304 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) | |
305 | return -EINVAL; | |
306 | ||
307 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) | |
308 | return -EINVAL; | |
309 | ||
8e95a202 | 310 | if (cmd->autoneg == AUTONEG_DISABLE && |
25db0338 DD |
311 | ((speed != SPEED_1000 && |
312 | speed != SPEED_100 && | |
313 | speed != SPEED_10) || | |
8e95a202 JP |
314 | (cmd->duplex != DUPLEX_HALF && |
315 | cmd->duplex != DUPLEX_FULL))) | |
00db8189 AF |
316 | return -EINVAL; |
317 | ||
318 | phydev->autoneg = cmd->autoneg; | |
319 | ||
25db0338 | 320 | phydev->speed = speed; |
00db8189 AF |
321 | |
322 | phydev->advertising = cmd->advertising; | |
323 | ||
324 | if (AUTONEG_ENABLE == cmd->autoneg) | |
325 | phydev->advertising |= ADVERTISED_Autoneg; | |
326 | else | |
327 | phydev->advertising &= ~ADVERTISED_Autoneg; | |
328 | ||
329 | phydev->duplex = cmd->duplex; | |
330 | ||
331 | /* Restart the PHY */ | |
332 | phy_start_aneg(phydev); | |
333 | ||
334 | return 0; | |
335 | } | |
9f6d55d0 | 336 | EXPORT_SYMBOL(phy_ethtool_sset); |
00db8189 AF |
337 | |
338 | int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
339 | { | |
340 | cmd->supported = phydev->supported; | |
341 | ||
342 | cmd->advertising = phydev->advertising; | |
114002bc | 343 | cmd->lp_advertising = phydev->lp_advertising; |
00db8189 | 344 | |
70739497 | 345 | ethtool_cmd_speed_set(cmd, phydev->speed); |
00db8189 | 346 | cmd->duplex = phydev->duplex; |
c88838ce FF |
347 | if (phydev->interface == PHY_INTERFACE_MODE_MOCA) |
348 | cmd->port = PORT_BNC; | |
349 | else | |
350 | cmd->port = PORT_MII; | |
00db8189 | 351 | cmd->phy_address = phydev->addr; |
4284b6a5 FF |
352 | cmd->transceiver = phy_is_internal(phydev) ? |
353 | XCVR_INTERNAL : XCVR_EXTERNAL; | |
00db8189 AF |
354 | cmd->autoneg = phydev->autoneg; |
355 | ||
356 | return 0; | |
357 | } | |
9f6d55d0 | 358 | EXPORT_SYMBOL(phy_ethtool_gset); |
00db8189 | 359 | |
b3df0da8 RD |
360 | /** |
361 | * phy_mii_ioctl - generic PHY MII ioctl interface | |
362 | * @phydev: the phy_device struct | |
00c7d920 | 363 | * @ifr: &struct ifreq for socket ioctl's |
b3df0da8 RD |
364 | * @cmd: ioctl cmd to execute |
365 | * | |
366 | * Note that this function is currently incompatible with the | |
00db8189 | 367 | * PHYCONTROL layer. It changes registers without regard to |
b3df0da8 | 368 | * current state. Use at own risk. |
00db8189 | 369 | */ |
2f53e904 | 370 | int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) |
00db8189 | 371 | { |
28b04113 | 372 | struct mii_ioctl_data *mii_data = if_mii(ifr); |
00db8189 | 373 | u16 val = mii_data->val_in; |
79ce0477 | 374 | bool change_autoneg = false; |
00db8189 AF |
375 | |
376 | switch (cmd) { | |
377 | case SIOCGMIIPHY: | |
378 | mii_data->phy_id = phydev->addr; | |
c6d6a511 LB |
379 | /* fall through */ |
380 | ||
00db8189 | 381 | case SIOCGMIIREG: |
af1dc13e PK |
382 | mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id, |
383 | mii_data->reg_num); | |
e62a768f | 384 | return 0; |
00db8189 AF |
385 | |
386 | case SIOCSMIIREG: | |
00db8189 | 387 | if (mii_data->phy_id == phydev->addr) { |
e109374f | 388 | switch (mii_data->reg_num) { |
00db8189 | 389 | case MII_BMCR: |
79ce0477 BH |
390 | if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { |
391 | if (phydev->autoneg == AUTONEG_ENABLE) | |
392 | change_autoneg = true; | |
00db8189 | 393 | phydev->autoneg = AUTONEG_DISABLE; |
79ce0477 BH |
394 | if (val & BMCR_FULLDPLX) |
395 | phydev->duplex = DUPLEX_FULL; | |
396 | else | |
397 | phydev->duplex = DUPLEX_HALF; | |
398 | if (val & BMCR_SPEED1000) | |
399 | phydev->speed = SPEED_1000; | |
400 | else if (val & BMCR_SPEED100) | |
401 | phydev->speed = SPEED_100; | |
402 | else phydev->speed = SPEED_10; | |
403 | } | |
404 | else { | |
405 | if (phydev->autoneg == AUTONEG_DISABLE) | |
406 | change_autoneg = true; | |
00db8189 | 407 | phydev->autoneg = AUTONEG_ENABLE; |
79ce0477 | 408 | } |
00db8189 AF |
409 | break; |
410 | case MII_ADVERTISE: | |
79ce0477 BH |
411 | phydev->advertising = mii_adv_to_ethtool_adv_t(val); |
412 | change_autoneg = true; | |
00db8189 AF |
413 | break; |
414 | default: | |
415 | /* do nothing */ | |
416 | break; | |
417 | } | |
418 | } | |
419 | ||
af1dc13e PK |
420 | mdiobus_write(phydev->bus, mii_data->phy_id, |
421 | mii_data->reg_num, val); | |
422 | ||
8e95a202 | 423 | if (mii_data->reg_num == MII_BMCR && |
2613f95f | 424 | val & BMCR_RESET) |
e62a768f | 425 | return phy_init_hw(phydev); |
79ce0477 BH |
426 | |
427 | if (change_autoneg) | |
428 | return phy_start_aneg(phydev); | |
429 | ||
e62a768f | 430 | return 0; |
dda93b48 | 431 | |
c1f19b51 RC |
432 | case SIOCSHWTSTAMP: |
433 | if (phydev->drv->hwtstamp) | |
434 | return phydev->drv->hwtstamp(phydev, ifr); | |
435 | /* fall through */ | |
436 | ||
dda93b48 | 437 | default: |
c6d6a511 | 438 | return -EOPNOTSUPP; |
00db8189 | 439 | } |
00db8189 | 440 | } |
680e9fe9 | 441 | EXPORT_SYMBOL(phy_mii_ioctl); |
00db8189 | 442 | |
b3df0da8 RD |
443 | /** |
444 | * phy_start_aneg - start auto-negotiation for this PHY device | |
445 | * @phydev: the phy_device struct | |
e1393456 | 446 | * |
b3df0da8 RD |
447 | * Description: Sanitizes the settings (if we're not autonegotiating |
448 | * them), and then calls the driver's config_aneg function. | |
449 | * If the PHYCONTROL Layer is operating, we change the state to | |
450 | * reflect the beginning of Auto-negotiation or forcing. | |
e1393456 AF |
451 | */ |
452 | int phy_start_aneg(struct phy_device *phydev) | |
453 | { | |
454 | int err; | |
455 | ||
35b5f6b1 | 456 | mutex_lock(&phydev->lock); |
e1393456 AF |
457 | |
458 | if (AUTONEG_DISABLE == phydev->autoneg) | |
459 | phy_sanitize_settings(phydev); | |
460 | ||
9b3320ef BH |
461 | /* Invalidate LP advertising flags */ |
462 | phydev->lp_advertising = 0; | |
463 | ||
e1393456 | 464 | err = phydev->drv->config_aneg(phydev); |
e1393456 AF |
465 | if (err < 0) |
466 | goto out_unlock; | |
467 | ||
db9683fb | 468 | if (phydev->state != PHY_HALTED && phydev->state != PHY_RESUMING) { |
e1393456 AF |
469 | if (AUTONEG_ENABLE == phydev->autoneg) { |
470 | phydev->state = PHY_AN; | |
471 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
472 | } else { | |
473 | phydev->state = PHY_FORCING; | |
474 | phydev->link_timeout = PHY_FORCE_TIMEOUT; | |
475 | } | |
476 | } | |
477 | ||
478 | out_unlock: | |
35b5f6b1 | 479 | mutex_unlock(&phydev->lock); |
e1393456 AF |
480 | return err; |
481 | } | |
482 | EXPORT_SYMBOL(phy_start_aneg); | |
483 | ||
b3df0da8 RD |
484 | /** |
485 | * phy_start_machine - start PHY state machine tracking | |
486 | * @phydev: the phy_device struct | |
00db8189 | 487 | * |
b3df0da8 | 488 | * Description: The PHY infrastructure can run a state machine |
00db8189 AF |
489 | * which tracks whether the PHY is starting up, negotiating, |
490 | * etc. This function starts the timer which tracks the state | |
29935aeb SS |
491 | * of the PHY. If you want to maintain your own state machine, |
492 | * do not call this function. | |
b3df0da8 | 493 | */ |
29935aeb | 494 | void phy_start_machine(struct phy_device *phydev) |
00db8189 | 495 | { |
bbb47bde | 496 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ); |
00db8189 AF |
497 | } |
498 | ||
b3df0da8 RD |
499 | /** |
500 | * phy_stop_machine - stop the PHY state machine tracking | |
501 | * @phydev: target phy_device struct | |
00db8189 | 502 | * |
b3df0da8 | 503 | * Description: Stops the state machine timer, sets the state to UP |
817acf5e | 504 | * (unless it wasn't up yet). This function must be called BEFORE |
00db8189 AF |
505 | * phy_detach. |
506 | */ | |
507 | void phy_stop_machine(struct phy_device *phydev) | |
508 | { | |
a390d1f3 | 509 | cancel_delayed_work_sync(&phydev->state_queue); |
00db8189 | 510 | |
35b5f6b1 | 511 | mutex_lock(&phydev->lock); |
00db8189 AF |
512 | if (phydev->state > PHY_UP) |
513 | phydev->state = PHY_UP; | |
35b5f6b1 | 514 | mutex_unlock(&phydev->lock); |
00db8189 AF |
515 | } |
516 | ||
b3df0da8 RD |
517 | /** |
518 | * phy_error - enter HALTED state for this PHY device | |
519 | * @phydev: target phy_device struct | |
00db8189 AF |
520 | * |
521 | * Moves the PHY to the HALTED state in response to a read | |
522 | * or write error, and tells the controller the link is down. | |
523 | * Must not be called from interrupt context, or while the | |
524 | * phydev->lock is held. | |
525 | */ | |
9b9a8bfc | 526 | static void phy_error(struct phy_device *phydev) |
00db8189 | 527 | { |
35b5f6b1 | 528 | mutex_lock(&phydev->lock); |
00db8189 | 529 | phydev->state = PHY_HALTED; |
35b5f6b1 | 530 | mutex_unlock(&phydev->lock); |
00db8189 AF |
531 | } |
532 | ||
b3df0da8 RD |
533 | /** |
534 | * phy_interrupt - PHY interrupt handler | |
535 | * @irq: interrupt line | |
536 | * @phy_dat: phy_device pointer | |
e1393456 | 537 | * |
b3df0da8 | 538 | * Description: When a PHY interrupt occurs, the handler disables |
e1393456 AF |
539 | * interrupts, and schedules a work task to clear the interrupt. |
540 | */ | |
7d12e780 | 541 | static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
e1393456 AF |
542 | { |
543 | struct phy_device *phydev = phy_dat; | |
544 | ||
3c3070d7 MR |
545 | if (PHY_HALTED == phydev->state) |
546 | return IRQ_NONE; /* It can't be ours. */ | |
547 | ||
e1393456 AF |
548 | /* The MDIO bus is not allowed to be written in interrupt |
549 | * context, so we need to disable the irq here. A work | |
550 | * queue will write the PHY to disable and clear the | |
2f53e904 SS |
551 | * interrupt, and then reenable the irq line. |
552 | */ | |
e1393456 | 553 | disable_irq_nosync(irq); |
0ac49527 | 554 | atomic_inc(&phydev->irq_disable); |
e1393456 | 555 | |
bbb47bde | 556 | queue_work(system_power_efficient_wq, &phydev->phy_queue); |
e1393456 AF |
557 | |
558 | return IRQ_HANDLED; | |
559 | } | |
560 | ||
b3df0da8 RD |
561 | /** |
562 | * phy_enable_interrupts - Enable the interrupts from the PHY side | |
563 | * @phydev: target phy_device struct | |
564 | */ | |
89ff05ec | 565 | static int phy_enable_interrupts(struct phy_device *phydev) |
00db8189 | 566 | { |
553fe92b | 567 | int err = phy_clear_interrupt(phydev); |
00db8189 | 568 | |
e1393456 AF |
569 | if (err < 0) |
570 | return err; | |
00db8189 | 571 | |
553fe92b | 572 | return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
00db8189 | 573 | } |
00db8189 | 574 | |
b3df0da8 RD |
575 | /** |
576 | * phy_disable_interrupts - Disable the PHY interrupts from the PHY side | |
577 | * @phydev: target phy_device struct | |
578 | */ | |
89ff05ec | 579 | static int phy_disable_interrupts(struct phy_device *phydev) |
00db8189 AF |
580 | { |
581 | int err; | |
582 | ||
583 | /* Disable PHY interrupts */ | |
584 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
00db8189 AF |
585 | if (err) |
586 | goto phy_err; | |
587 | ||
588 | /* Clear the interrupt */ | |
589 | err = phy_clear_interrupt(phydev); | |
00db8189 AF |
590 | if (err) |
591 | goto phy_err; | |
592 | ||
593 | return 0; | |
594 | ||
595 | phy_err: | |
596 | phy_error(phydev); | |
597 | ||
598 | return err; | |
599 | } | |
e1393456 | 600 | |
b3df0da8 RD |
601 | /** |
602 | * phy_start_interrupts - request and enable interrupts for a PHY device | |
603 | * @phydev: target phy_device struct | |
e1393456 | 604 | * |
b3df0da8 RD |
605 | * Description: Request the interrupt for the given PHY. |
606 | * If this fails, then we set irq to PHY_POLL. | |
e1393456 | 607 | * Otherwise, we enable the interrupts in the PHY. |
e1393456 | 608 | * This should only be called with a valid IRQ number. |
b3df0da8 | 609 | * Returns 0 on success or < 0 on error. |
e1393456 AF |
610 | */ |
611 | int phy_start_interrupts(struct phy_device *phydev) | |
612 | { | |
0ac49527 | 613 | atomic_set(&phydev->irq_disable, 0); |
33c133cc SS |
614 | if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt", |
615 | phydev) < 0) { | |
8d242488 JP |
616 | pr_warn("%s: Can't get IRQ %d (PHY)\n", |
617 | phydev->bus->name, phydev->irq); | |
e1393456 AF |
618 | phydev->irq = PHY_POLL; |
619 | return 0; | |
620 | } | |
621 | ||
e62a768f | 622 | return phy_enable_interrupts(phydev); |
e1393456 AF |
623 | } |
624 | EXPORT_SYMBOL(phy_start_interrupts); | |
625 | ||
b3df0da8 RD |
626 | /** |
627 | * phy_stop_interrupts - disable interrupts from a PHY device | |
628 | * @phydev: target phy_device struct | |
629 | */ | |
e1393456 AF |
630 | int phy_stop_interrupts(struct phy_device *phydev) |
631 | { | |
553fe92b | 632 | int err = phy_disable_interrupts(phydev); |
e1393456 AF |
633 | |
634 | if (err) | |
635 | phy_error(phydev); | |
636 | ||
0ac49527 MR |
637 | free_irq(phydev->irq, phydev); |
638 | ||
2f53e904 | 639 | /* Cannot call flush_scheduled_work() here as desired because |
0ac49527 MR |
640 | * of rtnl_lock(), but we do not really care about what would |
641 | * be done, except from enable_irq(), so cancel any work | |
642 | * possibly pending and take care of the matter below. | |
3c3070d7 | 643 | */ |
28e53bdd | 644 | cancel_work_sync(&phydev->phy_queue); |
2f53e904 | 645 | /* If work indeed has been cancelled, disable_irq() will have |
0ac49527 MR |
646 | * been left unbalanced from phy_interrupt() and enable_irq() |
647 | * has to be called so that other devices on the line work. | |
648 | */ | |
649 | while (atomic_dec_return(&phydev->irq_disable) >= 0) | |
650 | enable_irq(phydev->irq); | |
e1393456 AF |
651 | |
652 | return err; | |
653 | } | |
654 | EXPORT_SYMBOL(phy_stop_interrupts); | |
655 | ||
b3df0da8 RD |
656 | /** |
657 | * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes | |
658 | * @work: work_struct that describes the work to be done | |
659 | */ | |
5ea94e76 | 660 | void phy_change(struct work_struct *work) |
e1393456 | 661 | { |
c4028958 DH |
662 | struct phy_device *phydev = |
663 | container_of(work, struct phy_device, phy_queue); | |
e1393456 | 664 | |
a8729eb3 AG |
665 | if (phydev->drv->did_interrupt && |
666 | !phydev->drv->did_interrupt(phydev)) | |
667 | goto ignore; | |
668 | ||
e62a768f | 669 | if (phy_disable_interrupts(phydev)) |
e1393456 AF |
670 | goto phy_err; |
671 | ||
35b5f6b1 | 672 | mutex_lock(&phydev->lock); |
e1393456 AF |
673 | if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) |
674 | phydev->state = PHY_CHANGELINK; | |
35b5f6b1 | 675 | mutex_unlock(&phydev->lock); |
e1393456 | 676 | |
0ac49527 | 677 | atomic_dec(&phydev->irq_disable); |
e1393456 AF |
678 | enable_irq(phydev->irq); |
679 | ||
680 | /* Reenable interrupts */ | |
e62a768f SS |
681 | if (PHY_HALTED != phydev->state && |
682 | phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED)) | |
e1393456 AF |
683 | goto irq_enable_err; |
684 | ||
a390d1f3 MS |
685 | /* reschedule state queue work to run as soon as possible */ |
686 | cancel_delayed_work_sync(&phydev->state_queue); | |
bbb47bde | 687 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); |
e1393456 AF |
688 | return; |
689 | ||
a8729eb3 AG |
690 | ignore: |
691 | atomic_dec(&phydev->irq_disable); | |
692 | enable_irq(phydev->irq); | |
693 | return; | |
694 | ||
e1393456 AF |
695 | irq_enable_err: |
696 | disable_irq(phydev->irq); | |
0ac49527 | 697 | atomic_inc(&phydev->irq_disable); |
e1393456 AF |
698 | phy_err: |
699 | phy_error(phydev); | |
700 | } | |
701 | ||
b3df0da8 RD |
702 | /** |
703 | * phy_stop - Bring down the PHY link, and stop checking the status | |
704 | * @phydev: target phy_device struct | |
705 | */ | |
e1393456 AF |
706 | void phy_stop(struct phy_device *phydev) |
707 | { | |
35b5f6b1 | 708 | mutex_lock(&phydev->lock); |
e1393456 AF |
709 | |
710 | if (PHY_HALTED == phydev->state) | |
711 | goto out_unlock; | |
712 | ||
2c7b4921 | 713 | if (phy_interrupt_is_valid(phydev)) { |
e1393456 AF |
714 | /* Disable PHY Interrupts */ |
715 | phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
e1393456 | 716 | |
3c3070d7 MR |
717 | /* Clear any pending interrupts */ |
718 | phy_clear_interrupt(phydev); | |
719 | } | |
e1393456 | 720 | |
6daf6531 MR |
721 | phydev->state = PHY_HALTED; |
722 | ||
e1393456 | 723 | out_unlock: |
35b5f6b1 | 724 | mutex_unlock(&phydev->lock); |
3c3070d7 | 725 | |
2f53e904 | 726 | /* Cannot call flush_scheduled_work() here as desired because |
3c3070d7 MR |
727 | * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() |
728 | * will not reenable interrupts. | |
729 | */ | |
e1393456 | 730 | } |
2f53e904 | 731 | EXPORT_SYMBOL(phy_stop); |
e1393456 | 732 | |
b3df0da8 RD |
733 | /** |
734 | * phy_start - start or restart a PHY device | |
735 | * @phydev: target phy_device struct | |
e1393456 | 736 | * |
b3df0da8 | 737 | * Description: Indicates the attached device's readiness to |
e1393456 AF |
738 | * handle PHY-related work. Used during startup to start the |
739 | * PHY, and after a call to phy_stop() to resume operation. | |
740 | * Also used to indicate the MDIO bus has cleared an error | |
741 | * condition. | |
742 | */ | |
743 | void phy_start(struct phy_device *phydev) | |
744 | { | |
35b5f6b1 | 745 | mutex_lock(&phydev->lock); |
e1393456 AF |
746 | |
747 | switch (phydev->state) { | |
e109374f FF |
748 | case PHY_STARTING: |
749 | phydev->state = PHY_PENDING; | |
750 | break; | |
751 | case PHY_READY: | |
752 | phydev->state = PHY_UP; | |
753 | break; | |
754 | case PHY_HALTED: | |
755 | phydev->state = PHY_RESUMING; | |
756 | default: | |
757 | break; | |
e1393456 | 758 | } |
35b5f6b1 | 759 | mutex_unlock(&phydev->lock); |
e1393456 | 760 | } |
e1393456 | 761 | EXPORT_SYMBOL(phy_start); |
67c4f3fa | 762 | |
35b5f6b1 NC |
763 | /** |
764 | * phy_state_machine - Handle the state machine | |
765 | * @work: work_struct that describes the work to be done | |
35b5f6b1 | 766 | */ |
4f9c85a1 | 767 | void phy_state_machine(struct work_struct *work) |
00db8189 | 768 | { |
bf6aede7 | 769 | struct delayed_work *dwork = to_delayed_work(work); |
35b5f6b1 | 770 | struct phy_device *phydev = |
a390d1f3 | 771 | container_of(dwork, struct phy_device, state_queue); |
6e14a5ee | 772 | bool needs_aneg = false, do_suspend = false, do_resume = false; |
00db8189 AF |
773 | int err = 0; |
774 | ||
35b5f6b1 | 775 | mutex_lock(&phydev->lock); |
00db8189 | 776 | |
2b8f2a28 DM |
777 | if (phydev->drv->link_change_notify) |
778 | phydev->drv->link_change_notify(phydev); | |
779 | ||
e109374f FF |
780 | switch (phydev->state) { |
781 | case PHY_DOWN: | |
782 | case PHY_STARTING: | |
783 | case PHY_READY: | |
784 | case PHY_PENDING: | |
785 | break; | |
786 | case PHY_UP: | |
6e14a5ee | 787 | needs_aneg = true; |
00db8189 | 788 | |
e109374f FF |
789 | phydev->link_timeout = PHY_AN_TIMEOUT; |
790 | ||
791 | break; | |
792 | case PHY_AN: | |
793 | err = phy_read_status(phydev); | |
e109374f | 794 | if (err < 0) |
00db8189 | 795 | break; |
6b655529 | 796 | |
2f53e904 | 797 | /* If the link is down, give up on negotiation for now */ |
e109374f FF |
798 | if (!phydev->link) { |
799 | phydev->state = PHY_NOLINK; | |
800 | netif_carrier_off(phydev->attached_dev); | |
801 | phydev->adjust_link(phydev->attached_dev); | |
802 | break; | |
803 | } | |
6b655529 | 804 | |
2f53e904 | 805 | /* Check if negotiation is done. Break if there's an error */ |
e109374f FF |
806 | err = phy_aneg_done(phydev); |
807 | if (err < 0) | |
808 | break; | |
6b655529 | 809 | |
e109374f FF |
810 | /* If AN is done, we're running */ |
811 | if (err > 0) { | |
812 | phydev->state = PHY_RUNNING; | |
813 | netif_carrier_on(phydev->attached_dev); | |
814 | phydev->adjust_link(phydev->attached_dev); | |
00db8189 | 815 | |
fa8cddaf | 816 | } else if (0 == phydev->link_timeout--) |
6e14a5ee | 817 | needs_aneg = true; |
e109374f FF |
818 | break; |
819 | case PHY_NOLINK: | |
820 | err = phy_read_status(phydev); | |
e109374f | 821 | if (err) |
00db8189 | 822 | break; |
00db8189 | 823 | |
e109374f | 824 | if (phydev->link) { |
e46e08b8 BK |
825 | if (AUTONEG_ENABLE == phydev->autoneg) { |
826 | err = phy_aneg_done(phydev); | |
827 | if (err < 0) | |
828 | break; | |
829 | ||
830 | if (!err) { | |
831 | phydev->state = PHY_AN; | |
832 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
833 | break; | |
834 | } | |
835 | } | |
e109374f FF |
836 | phydev->state = PHY_RUNNING; |
837 | netif_carrier_on(phydev->attached_dev); | |
838 | phydev->adjust_link(phydev->attached_dev); | |
839 | } | |
840 | break; | |
841 | case PHY_FORCING: | |
842 | err = genphy_update_link(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 | if (0 == phydev->link_timeout--) | |
6e14a5ee | 851 | needs_aneg = true; |
e109374f | 852 | } |
00db8189 | 853 | |
e109374f FF |
854 | phydev->adjust_link(phydev->attached_dev); |
855 | break; | |
856 | case PHY_RUNNING: | |
857 | /* Only register a CHANGE if we are | |
858 | * polling or ignoring interrupts | |
859 | */ | |
860 | if (!phy_interrupt_is_valid(phydev)) | |
861 | phydev->state = PHY_CHANGELINK; | |
862 | break; | |
863 | case PHY_CHANGELINK: | |
864 | err = phy_read_status(phydev); | |
e109374f | 865 | if (err) |
00db8189 | 866 | break; |
00db8189 | 867 | |
e109374f FF |
868 | if (phydev->link) { |
869 | phydev->state = PHY_RUNNING; | |
870 | netif_carrier_on(phydev->attached_dev); | |
871 | } else { | |
872 | phydev->state = PHY_NOLINK; | |
873 | netif_carrier_off(phydev->attached_dev); | |
874 | } | |
00db8189 | 875 | |
e109374f | 876 | phydev->adjust_link(phydev->attached_dev); |
00db8189 | 877 | |
e109374f FF |
878 | if (phy_interrupt_is_valid(phydev)) |
879 | err = phy_config_interrupt(phydev, | |
2f53e904 | 880 | PHY_INTERRUPT_ENABLED); |
e109374f FF |
881 | break; |
882 | case PHY_HALTED: | |
883 | if (phydev->link) { | |
884 | phydev->link = 0; | |
885 | netif_carrier_off(phydev->attached_dev); | |
00db8189 | 886 | phydev->adjust_link(phydev->attached_dev); |
6e14a5ee | 887 | do_suspend = true; |
e109374f FF |
888 | } |
889 | break; | |
890 | case PHY_RESUMING: | |
e109374f | 891 | err = phy_clear_interrupt(phydev); |
e109374f FF |
892 | if (err) |
893 | break; | |
00db8189 | 894 | |
2f53e904 | 895 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
e109374f FF |
896 | if (err) |
897 | break; | |
00db8189 | 898 | |
e109374f FF |
899 | if (AUTONEG_ENABLE == phydev->autoneg) { |
900 | err = phy_aneg_done(phydev); | |
901 | if (err < 0) | |
00db8189 AF |
902 | break; |
903 | ||
e109374f | 904 | /* err > 0 if AN is done. |
2f53e904 SS |
905 | * Otherwise, it's 0, and we're still waiting for AN |
906 | */ | |
e109374f | 907 | if (err > 0) { |
42caa074 WF |
908 | err = phy_read_status(phydev); |
909 | if (err) | |
910 | break; | |
911 | ||
912 | if (phydev->link) { | |
913 | phydev->state = PHY_RUNNING; | |
914 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 915 | } else { |
42caa074 | 916 | phydev->state = PHY_NOLINK; |
2f53e904 | 917 | } |
42caa074 | 918 | phydev->adjust_link(phydev->attached_dev); |
e109374f FF |
919 | } else { |
920 | phydev->state = PHY_AN; | |
921 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
42caa074 | 922 | } |
e109374f FF |
923 | } else { |
924 | err = phy_read_status(phydev); | |
925 | if (err) | |
926 | break; | |
927 | ||
928 | if (phydev->link) { | |
929 | phydev->state = PHY_RUNNING; | |
930 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 931 | } else { |
e109374f | 932 | phydev->state = PHY_NOLINK; |
2f53e904 | 933 | } |
e109374f FF |
934 | phydev->adjust_link(phydev->attached_dev); |
935 | } | |
6e14a5ee | 936 | do_resume = true; |
e109374f | 937 | break; |
00db8189 AF |
938 | } |
939 | ||
35b5f6b1 | 940 | mutex_unlock(&phydev->lock); |
00db8189 AF |
941 | |
942 | if (needs_aneg) | |
943 | err = phy_start_aneg(phydev); | |
6e14a5ee | 944 | else if (do_suspend) |
be9dad1f | 945 | phy_suspend(phydev); |
6e14a5ee ZG |
946 | else if (do_resume) |
947 | phy_resume(phydev); | |
be9dad1f | 948 | |
00db8189 AF |
949 | if (err < 0) |
950 | phy_error(phydev); | |
951 | ||
bbb47bde | 952 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, |
2f53e904 | 953 | PHY_STATE_TIME * HZ); |
35b5f6b1 | 954 | } |
a59a4d19 | 955 | |
5ea94e76 FF |
956 | void phy_mac_interrupt(struct phy_device *phydev, int new_link) |
957 | { | |
958 | cancel_work_sync(&phydev->phy_queue); | |
959 | phydev->link = new_link; | |
960 | schedule_work(&phydev->phy_queue); | |
961 | } | |
962 | EXPORT_SYMBOL(phy_mac_interrupt); | |
963 | ||
a59a4d19 GC |
964 | static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad, |
965 | int addr) | |
966 | { | |
967 | /* Write the desired MMD Devad */ | |
968 | bus->write(bus, addr, MII_MMD_CTRL, devad); | |
969 | ||
970 | /* Write the desired MMD register address */ | |
971 | bus->write(bus, addr, MII_MMD_DATA, prtad); | |
972 | ||
973 | /* Select the Function : DATA with no post increment */ | |
974 | bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR)); | |
975 | } | |
976 | ||
977 | /** | |
978 | * phy_read_mmd_indirect - reads data from the MMD registers | |
0c1d77df | 979 | * @phydev: The PHY device bus |
a59a4d19 GC |
980 | * @prtad: MMD Address |
981 | * @devad: MMD DEVAD | |
982 | * @addr: PHY address on the MII bus | |
983 | * | |
984 | * Description: it reads data from the MMD registers (clause 22 to access to | |
985 | * clause 45) of the specified phy address. | |
986 | * To read these register we have: | |
987 | * 1) Write reg 13 // DEVAD | |
988 | * 2) Write reg 14 // MMD Address | |
989 | * 3) Write reg 13 // MMD Data Command for MMD DEVAD | |
990 | * 3) Read reg 14 // Read MMD data | |
991 | */ | |
66ce7fb9 | 992 | int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, |
0c1d77df | 993 | int devad, int addr) |
a59a4d19 | 994 | { |
0c1d77df VB |
995 | struct phy_driver *phydrv = phydev->drv; |
996 | int value = -1; | |
a59a4d19 | 997 | |
0c1d77df VB |
998 | if (phydrv->read_mmd_indirect == NULL) { |
999 | mmd_phy_indirect(phydev->bus, prtad, devad, addr); | |
1000 | ||
1001 | /* Read the content of the MMD's selected register */ | |
1002 | value = phydev->bus->read(phydev->bus, addr, MII_MMD_DATA); | |
1003 | } else { | |
1004 | value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr); | |
1005 | } | |
1006 | return value; | |
a59a4d19 | 1007 | } |
66ce7fb9 | 1008 | EXPORT_SYMBOL(phy_read_mmd_indirect); |
a59a4d19 GC |
1009 | |
1010 | /** | |
1011 | * phy_write_mmd_indirect - writes data to the MMD registers | |
0c1d77df | 1012 | * @phydev: The PHY device |
a59a4d19 GC |
1013 | * @prtad: MMD Address |
1014 | * @devad: MMD DEVAD | |
1015 | * @addr: PHY address on the MII bus | |
1016 | * @data: data to write in the MMD register | |
1017 | * | |
1018 | * Description: Write data from the MMD registers of the specified | |
1019 | * phy address. | |
1020 | * To write these register we have: | |
1021 | * 1) Write reg 13 // DEVAD | |
1022 | * 2) Write reg 14 // MMD Address | |
1023 | * 3) Write reg 13 // MMD Data Command for MMD DEVAD | |
1024 | * 3) Write reg 14 // Write MMD data | |
1025 | */ | |
66ce7fb9 | 1026 | void phy_write_mmd_indirect(struct phy_device *phydev, int prtad, |
0c1d77df | 1027 | int devad, int addr, u32 data) |
a59a4d19 | 1028 | { |
0c1d77df | 1029 | struct phy_driver *phydrv = phydev->drv; |
a59a4d19 | 1030 | |
0c1d77df VB |
1031 | if (phydrv->write_mmd_indirect == NULL) { |
1032 | mmd_phy_indirect(phydev->bus, prtad, devad, addr); | |
1033 | ||
1034 | /* Write the data into MMD's selected register */ | |
1035 | phydev->bus->write(phydev->bus, addr, MII_MMD_DATA, data); | |
1036 | } else { | |
1037 | phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data); | |
1038 | } | |
a59a4d19 | 1039 | } |
66ce7fb9 | 1040 | EXPORT_SYMBOL(phy_write_mmd_indirect); |
a59a4d19 | 1041 | |
a59a4d19 GC |
1042 | /** |
1043 | * phy_init_eee - init and check the EEE feature | |
1044 | * @phydev: target phy_device struct | |
1045 | * @clk_stop_enable: PHY may stop the clock during LPI | |
1046 | * | |
1047 | * Description: it checks if the Energy-Efficient Ethernet (EEE) | |
1048 | * is supported by looking at the MMD registers 3.20 and 7.60/61 | |
1049 | * and it programs the MMD register 3.0 setting the "Clock stop enable" | |
1050 | * bit if required. | |
1051 | */ | |
1052 | int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) | |
1053 | { | |
a59a4d19 GC |
1054 | /* According to 802.3az,the EEE is supported only in full duplex-mode. |
1055 | * Also EEE feature is active when core is operating with MII, GMII | |
7e140696 FF |
1056 | * or RGMII (all kinds). Internal PHYs are also allowed to proceed and |
1057 | * should return an error if they do not support EEE. | |
a59a4d19 GC |
1058 | */ |
1059 | if ((phydev->duplex == DUPLEX_FULL) && | |
1060 | ((phydev->interface == PHY_INTERFACE_MODE_MII) || | |
1061 | (phydev->interface == PHY_INTERFACE_MODE_GMII) || | |
7e140696 FF |
1062 | (phydev->interface >= PHY_INTERFACE_MODE_RGMII && |
1063 | phydev->interface <= PHY_INTERFACE_MODE_RGMII_TXID) || | |
a9f63095 | 1064 | phy_is_internal(phydev))) { |
a59a4d19 GC |
1065 | int eee_lp, eee_cap, eee_adv; |
1066 | u32 lp, cap, adv; | |
4ae6e50c | 1067 | int status; |
a59a4d19 GC |
1068 | |
1069 | /* Read phy status to properly get the right settings */ | |
1070 | status = phy_read_status(phydev); | |
1071 | if (status) | |
1072 | return status; | |
1073 | ||
1074 | /* First check if the EEE ability is supported */ | |
0c1d77df | 1075 | eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, |
a59a4d19 | 1076 | MDIO_MMD_PCS, phydev->addr); |
7a4cecf7 GC |
1077 | if (eee_cap <= 0) |
1078 | goto eee_exit_err; | |
a59a4d19 | 1079 | |
b32607dd | 1080 | cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); |
a59a4d19 | 1081 | if (!cap) |
7a4cecf7 | 1082 | goto eee_exit_err; |
a59a4d19 GC |
1083 | |
1084 | /* Check which link settings negotiated and verify it in | |
1085 | * the EEE advertising registers. | |
1086 | */ | |
0c1d77df | 1087 | eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, |
a59a4d19 | 1088 | MDIO_MMD_AN, phydev->addr); |
7a4cecf7 GC |
1089 | if (eee_lp <= 0) |
1090 | goto eee_exit_err; | |
a59a4d19 | 1091 | |
0c1d77df | 1092 | eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, |
a59a4d19 | 1093 | MDIO_MMD_AN, phydev->addr); |
7a4cecf7 GC |
1094 | if (eee_adv <= 0) |
1095 | goto eee_exit_err; | |
a59a4d19 | 1096 | |
b32607dd AB |
1097 | adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv); |
1098 | lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp); | |
54da5a8b | 1099 | if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv)) |
7a4cecf7 | 1100 | goto eee_exit_err; |
a59a4d19 GC |
1101 | |
1102 | if (clk_stop_enable) { | |
1103 | /* Configure the PHY to stop receiving xMII | |
1104 | * clock while it is signaling LPI. | |
1105 | */ | |
0c1d77df | 1106 | int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1, |
a59a4d19 GC |
1107 | MDIO_MMD_PCS, |
1108 | phydev->addr); | |
1109 | if (val < 0) | |
1110 | return val; | |
1111 | ||
1112 | val |= MDIO_PCS_CTRL1_CLKSTOP_EN; | |
0c1d77df VB |
1113 | phy_write_mmd_indirect(phydev, MDIO_CTRL1, |
1114 | MDIO_MMD_PCS, phydev->addr, | |
1115 | val); | |
a59a4d19 GC |
1116 | } |
1117 | ||
e62a768f | 1118 | return 0; /* EEE supported */ |
a59a4d19 | 1119 | } |
7a4cecf7 | 1120 | eee_exit_err: |
e62a768f | 1121 | return -EPROTONOSUPPORT; |
a59a4d19 GC |
1122 | } |
1123 | EXPORT_SYMBOL(phy_init_eee); | |
1124 | ||
1125 | /** | |
1126 | * phy_get_eee_err - report the EEE wake error count | |
1127 | * @phydev: target phy_device struct | |
1128 | * | |
1129 | * Description: it is to report the number of time where the PHY | |
1130 | * failed to complete its normal wake sequence. | |
1131 | */ | |
1132 | int phy_get_eee_err(struct phy_device *phydev) | |
1133 | { | |
0c1d77df | 1134 | return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, |
a59a4d19 | 1135 | MDIO_MMD_PCS, phydev->addr); |
a59a4d19 GC |
1136 | } |
1137 | EXPORT_SYMBOL(phy_get_eee_err); | |
1138 | ||
1139 | /** | |
1140 | * phy_ethtool_get_eee - get EEE supported and status | |
1141 | * @phydev: target phy_device struct | |
1142 | * @data: ethtool_eee data | |
1143 | * | |
1144 | * Description: it reportes the Supported/Advertisement/LP Advertisement | |
1145 | * capabilities. | |
1146 | */ | |
1147 | int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1148 | { | |
1149 | int val; | |
1150 | ||
1151 | /* Get Supported EEE */ | |
0c1d77df | 1152 | val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, |
a59a4d19 GC |
1153 | MDIO_MMD_PCS, phydev->addr); |
1154 | if (val < 0) | |
1155 | return val; | |
b32607dd | 1156 | data->supported = mmd_eee_cap_to_ethtool_sup_t(val); |
a59a4d19 GC |
1157 | |
1158 | /* Get advertisement EEE */ | |
0c1d77df | 1159 | val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, |
a59a4d19 GC |
1160 | MDIO_MMD_AN, phydev->addr); |
1161 | if (val < 0) | |
1162 | return val; | |
b32607dd | 1163 | data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1164 | |
1165 | /* Get LP advertisement EEE */ | |
0c1d77df | 1166 | val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, |
a59a4d19 GC |
1167 | MDIO_MMD_AN, phydev->addr); |
1168 | if (val < 0) | |
1169 | return val; | |
b32607dd | 1170 | data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1171 | |
1172 | return 0; | |
1173 | } | |
1174 | EXPORT_SYMBOL(phy_ethtool_get_eee); | |
1175 | ||
1176 | /** | |
1177 | * phy_ethtool_set_eee - set EEE supported and status | |
1178 | * @phydev: target phy_device struct | |
1179 | * @data: ethtool_eee data | |
1180 | * | |
1181 | * Description: it is to program the Advertisement EEE register. | |
1182 | */ | |
1183 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1184 | { | |
553fe92b | 1185 | int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised); |
a59a4d19 | 1186 | |
0c1d77df | 1187 | phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, |
a59a4d19 GC |
1188 | phydev->addr, val); |
1189 | ||
1190 | return 0; | |
1191 | } | |
1192 | EXPORT_SYMBOL(phy_ethtool_set_eee); | |
42e836eb MS |
1193 | |
1194 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1195 | { | |
1196 | if (phydev->drv->set_wol) | |
1197 | return phydev->drv->set_wol(phydev, wol); | |
1198 | ||
1199 | return -EOPNOTSUPP; | |
1200 | } | |
1201 | EXPORT_SYMBOL(phy_ethtool_set_wol); | |
1202 | ||
1203 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1204 | { | |
1205 | if (phydev->drv->get_wol) | |
1206 | phydev->drv->get_wol(phydev, wol); | |
1207 | } | |
1208 | EXPORT_SYMBOL(phy_ethtool_get_wol); |