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Commit | Line | Data |
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2f53e904 | 1 | /* Framework for configuring and reading PHY devices |
00db8189 AF |
2 | * Based on code in sungem_phy.c and gianfar_phy.c |
3 | * | |
4 | * Author: Andy Fleming | |
5 | * | |
6 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
0ac49527 | 7 | * Copyright (c) 2006, 2007 Maciej W. Rozycki |
00db8189 AF |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of the GNU General Public License as published by the | |
11 | * Free Software Foundation; either version 2 of the License, or (at your | |
12 | * option) any later version. | |
13 | * | |
14 | */ | |
8d242488 JP |
15 | |
16 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
17 | ||
00db8189 | 18 | #include <linux/kernel.h> |
00db8189 AF |
19 | #include <linux/string.h> |
20 | #include <linux/errno.h> | |
21 | #include <linux/unistd.h> | |
00db8189 | 22 | #include <linux/interrupt.h> |
00db8189 AF |
23 | #include <linux/delay.h> |
24 | #include <linux/netdevice.h> | |
25 | #include <linux/etherdevice.h> | |
26 | #include <linux/skbuff.h> | |
00db8189 AF |
27 | #include <linux/mm.h> |
28 | #include <linux/module.h> | |
00db8189 AF |
29 | #include <linux/mii.h> |
30 | #include <linux/ethtool.h> | |
31 | #include <linux/phy.h> | |
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 | ||
3e2186e0 FF |
61 | #define PHY_STATE_STR(_state) \ |
62 | case PHY_##_state: \ | |
63 | return __stringify(_state); \ | |
64 | ||
65 | static 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 | ||
b3df0da8 RD |
86 | /** |
87 | * phy_print_status - Convenience function to print out the current phy status | |
88 | * @phydev: the phy_device struct | |
e1393456 AF |
89 | */ |
90 | void phy_print_status(struct phy_device *phydev) | |
91 | { | |
2f53e904 | 92 | if (phydev->link) { |
df40cc88 | 93 | netdev_info(phydev->attached_dev, |
766d1d38 FF |
94 | "Link is Up - %s/%s - flow control %s\n", |
95 | phy_speed_to_str(phydev->speed), | |
df40cc88 FF |
96 | DUPLEX_FULL == phydev->duplex ? "Full" : "Half", |
97 | phydev->pause ? "rx/tx" : "off"); | |
2f53e904 | 98 | } else { |
43b6329f | 99 | netdev_info(phydev->attached_dev, "Link is Down\n"); |
2f53e904 | 100 | } |
e1393456 AF |
101 | } |
102 | EXPORT_SYMBOL(phy_print_status); | |
00db8189 | 103 | |
b3df0da8 RD |
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 | * | |
ad033506 | 111 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 112 | */ |
89ff05ec | 113 | static int phy_clear_interrupt(struct phy_device *phydev) |
00db8189 | 114 | { |
00db8189 | 115 | if (phydev->drv->ack_interrupt) |
e62a768f | 116 | return phydev->drv->ack_interrupt(phydev); |
00db8189 | 117 | |
e62a768f | 118 | return 0; |
00db8189 AF |
119 | } |
120 | ||
b3df0da8 RD |
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 | * | |
ad033506 | 126 | * Returns 0 on success or < 0 on error. |
b3df0da8 | 127 | */ |
89ff05ec | 128 | static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) |
00db8189 | 129 | { |
00db8189 AF |
130 | phydev->interrupts = interrupts; |
131 | if (phydev->drv->config_intr) | |
e62a768f | 132 | return phydev->drv->config_intr(phydev); |
00db8189 | 133 | |
e62a768f | 134 | return 0; |
00db8189 AF |
135 | } |
136 | ||
137 | ||
b3df0da8 RD |
138 | /** |
139 | * phy_aneg_done - return auto-negotiation status | |
140 | * @phydev: target phy_device struct | |
00db8189 | 141 | * |
76a423a3 FF |
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. | |
00db8189 AF |
145 | */ |
146 | static inline int phy_aneg_done(struct phy_device *phydev) | |
147 | { | |
76a423a3 FF |
148 | if (phydev->drv->aneg_done) |
149 | return phydev->drv->aneg_done(phydev); | |
150 | ||
a9fa6e6a | 151 | return genphy_aneg_done(phydev); |
00db8189 AF |
152 | } |
153 | ||
00db8189 | 154 | /* A structure for mapping a particular speed and duplex |
2f53e904 SS |
155 | * combination to a particular SUPPORTED and ADVERTISED value |
156 | */ | |
00db8189 AF |
157 | struct phy_setting { |
158 | int speed; | |
159 | int duplex; | |
160 | u32 setting; | |
161 | }; | |
162 | ||
163 | /* A mapping of all SUPPORTED settings to speed/duplex */ | |
f71e1309 | 164 | static const struct phy_setting settings[] = { |
00db8189 | 165 | { |
3e707706 LT |
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, | |
00db8189 AF |
177 | .duplex = DUPLEX_FULL, |
178 | .setting = SUPPORTED_10000baseT_Full, | |
179 | }, | |
3e707706 LT |
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 | }, | |
00db8189 AF |
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 | ||
ff8ac609 | 222 | #define MAX_NUM_SETTINGS ARRAY_SIZE(settings) |
00db8189 | 223 | |
b3df0da8 RD |
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 | |
00db8189 | 228 | * |
b3df0da8 | 229 | * Description: Searches the settings array for the setting which |
00db8189 AF |
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 | */ | |
4ae6e50c | 234 | static inline unsigned int phy_find_setting(int speed, int duplex) |
00db8189 | 235 | { |
4ae6e50c | 236 | unsigned int idx = 0; |
00db8189 AF |
237 | |
238 | while (idx < ARRAY_SIZE(settings) && | |
2f53e904 | 239 | (settings[idx].speed != speed || settings[idx].duplex != duplex)) |
00db8189 AF |
240 | idx++; |
241 | ||
242 | return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; | |
243 | } | |
244 | ||
b3df0da8 RD |
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 | |
00db8189 | 249 | * |
b3df0da8 | 250 | * Description: Returns the index of the first valid setting less |
00db8189 AF |
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 | */ | |
4ae6e50c | 255 | static inline unsigned int phy_find_valid(unsigned int idx, u32 features) |
00db8189 AF |
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 | ||
54da5a8b GR |
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 | */ | |
272 | static 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 | ||
b3df0da8 RD |
282 | /** |
283 | * phy_sanitize_settings - make sure the PHY is set to supported speed and duplex | |
284 | * @phydev: the target phy_device struct | |
00db8189 | 285 | * |
b3df0da8 | 286 | * Description: Make sure the PHY is set to supported speeds and |
00db8189 | 287 | * duplexes. Drop down by one in this order: 1000/FULL, |
b3df0da8 | 288 | * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF. |
00db8189 | 289 | */ |
89ff05ec | 290 | static void phy_sanitize_settings(struct phy_device *phydev) |
00db8189 AF |
291 | { |
292 | u32 features = phydev->supported; | |
4ae6e50c | 293 | unsigned int idx; |
00db8189 AF |
294 | |
295 | /* Sanitize settings based on PHY capabilities */ | |
296 | if ((features & SUPPORTED_Autoneg) == 0) | |
163642a2 | 297 | phydev->autoneg = AUTONEG_DISABLE; |
00db8189 AF |
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 | } | |
00db8189 | 305 | |
b3df0da8 RD |
306 | /** |
307 | * phy_ethtool_sset - generic ethtool sset function, handles all the details | |
308 | * @phydev: target phy_device struct | |
309 | * @cmd: ethtool_cmd | |
00db8189 AF |
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 | |
b3df0da8 | 316 | * care if ethtool tries to give us bad values. |
00db8189 AF |
317 | */ |
318 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
319 | { | |
25db0338 DD |
320 | u32 speed = ethtool_cmd_speed(cmd); |
321 | ||
00db8189 AF |
322 | if (cmd->phy_address != phydev->addr) |
323 | return -EINVAL; | |
324 | ||
2f53e904 | 325 | /* We make sure that we don't pass unsupported values in to the PHY */ |
00db8189 AF |
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 | ||
8e95a202 | 335 | if (cmd->autoneg == AUTONEG_DISABLE && |
25db0338 DD |
336 | ((speed != SPEED_1000 && |
337 | speed != SPEED_100 && | |
338 | speed != SPEED_10) || | |
8e95a202 JP |
339 | (cmd->duplex != DUPLEX_HALF && |
340 | cmd->duplex != DUPLEX_FULL))) | |
00db8189 AF |
341 | return -EINVAL; |
342 | ||
343 | phydev->autoneg = cmd->autoneg; | |
344 | ||
25db0338 | 345 | phydev->speed = speed; |
00db8189 AF |
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 | ||
634ec36c DT |
356 | phydev->mdix = cmd->eth_tp_mdix_ctrl; |
357 | ||
00db8189 AF |
358 | /* Restart the PHY */ |
359 | phy_start_aneg(phydev); | |
360 | ||
361 | return 0; | |
362 | } | |
9f6d55d0 | 363 | EXPORT_SYMBOL(phy_ethtool_sset); |
00db8189 AF |
364 | |
365 | int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
366 | { | |
367 | cmd->supported = phydev->supported; | |
368 | ||
369 | cmd->advertising = phydev->advertising; | |
114002bc | 370 | cmd->lp_advertising = phydev->lp_advertising; |
00db8189 | 371 | |
70739497 | 372 | ethtool_cmd_speed_set(cmd, phydev->speed); |
00db8189 | 373 | cmd->duplex = phydev->duplex; |
c88838ce FF |
374 | if (phydev->interface == PHY_INTERFACE_MODE_MOCA) |
375 | cmd->port = PORT_BNC; | |
376 | else | |
377 | cmd->port = PORT_MII; | |
00db8189 | 378 | cmd->phy_address = phydev->addr; |
4284b6a5 FF |
379 | cmd->transceiver = phy_is_internal(phydev) ? |
380 | XCVR_INTERNAL : XCVR_EXTERNAL; | |
00db8189 | 381 | cmd->autoneg = phydev->autoneg; |
239aa55b | 382 | cmd->eth_tp_mdix_ctrl = phydev->mdix; |
00db8189 AF |
383 | |
384 | return 0; | |
385 | } | |
9f6d55d0 | 386 | EXPORT_SYMBOL(phy_ethtool_gset); |
00db8189 | 387 | |
b3df0da8 RD |
388 | /** |
389 | * phy_mii_ioctl - generic PHY MII ioctl interface | |
390 | * @phydev: the phy_device struct | |
00c7d920 | 391 | * @ifr: &struct ifreq for socket ioctl's |
b3df0da8 RD |
392 | * @cmd: ioctl cmd to execute |
393 | * | |
394 | * Note that this function is currently incompatible with the | |
00db8189 | 395 | * PHYCONTROL layer. It changes registers without regard to |
b3df0da8 | 396 | * current state. Use at own risk. |
00db8189 | 397 | */ |
2f53e904 | 398 | int phy_mii_ioctl(struct phy_device *phydev, struct ifreq *ifr, int cmd) |
00db8189 | 399 | { |
28b04113 | 400 | struct mii_ioctl_data *mii_data = if_mii(ifr); |
00db8189 | 401 | u16 val = mii_data->val_in; |
79ce0477 | 402 | bool change_autoneg = false; |
00db8189 AF |
403 | |
404 | switch (cmd) { | |
405 | case SIOCGMIIPHY: | |
406 | mii_data->phy_id = phydev->addr; | |
c6d6a511 LB |
407 | /* fall through */ |
408 | ||
00db8189 | 409 | case SIOCGMIIREG: |
af1dc13e PK |
410 | mii_data->val_out = mdiobus_read(phydev->bus, mii_data->phy_id, |
411 | mii_data->reg_num); | |
e62a768f | 412 | return 0; |
00db8189 AF |
413 | |
414 | case SIOCSMIIREG: | |
00db8189 | 415 | if (mii_data->phy_id == phydev->addr) { |
e109374f | 416 | switch (mii_data->reg_num) { |
00db8189 | 417 | case MII_BMCR: |
79ce0477 BH |
418 | if ((val & (BMCR_RESET | BMCR_ANENABLE)) == 0) { |
419 | if (phydev->autoneg == AUTONEG_ENABLE) | |
420 | change_autoneg = true; | |
00db8189 | 421 | phydev->autoneg = AUTONEG_DISABLE; |
79ce0477 BH |
422 | if (val & BMCR_FULLDPLX) |
423 | phydev->duplex = DUPLEX_FULL; | |
424 | else | |
425 | phydev->duplex = DUPLEX_HALF; | |
426 | if (val & BMCR_SPEED1000) | |
427 | phydev->speed = SPEED_1000; | |
428 | else if (val & BMCR_SPEED100) | |
429 | phydev->speed = SPEED_100; | |
430 | else phydev->speed = SPEED_10; | |
431 | } | |
432 | else { | |
433 | if (phydev->autoneg == AUTONEG_DISABLE) | |
434 | change_autoneg = true; | |
00db8189 | 435 | phydev->autoneg = AUTONEG_ENABLE; |
79ce0477 | 436 | } |
00db8189 AF |
437 | break; |
438 | case MII_ADVERTISE: | |
79ce0477 BH |
439 | phydev->advertising = mii_adv_to_ethtool_adv_t(val); |
440 | change_autoneg = true; | |
00db8189 AF |
441 | break; |
442 | default: | |
443 | /* do nothing */ | |
444 | break; | |
445 | } | |
446 | } | |
447 | ||
af1dc13e PK |
448 | mdiobus_write(phydev->bus, mii_data->phy_id, |
449 | mii_data->reg_num, val); | |
450 | ||
cf18b778 JP |
451 | if (mii_data->phy_id == phydev->addr && |
452 | mii_data->reg_num == MII_BMCR && | |
2613f95f | 453 | val & BMCR_RESET) |
e62a768f | 454 | return phy_init_hw(phydev); |
79ce0477 BH |
455 | |
456 | if (change_autoneg) | |
457 | return phy_start_aneg(phydev); | |
458 | ||
e62a768f | 459 | return 0; |
dda93b48 | 460 | |
c1f19b51 RC |
461 | case SIOCSHWTSTAMP: |
462 | if (phydev->drv->hwtstamp) | |
463 | return phydev->drv->hwtstamp(phydev, ifr); | |
464 | /* fall through */ | |
465 | ||
dda93b48 | 466 | default: |
c6d6a511 | 467 | return -EOPNOTSUPP; |
00db8189 | 468 | } |
00db8189 | 469 | } |
680e9fe9 | 470 | EXPORT_SYMBOL(phy_mii_ioctl); |
00db8189 | 471 | |
b3df0da8 RD |
472 | /** |
473 | * phy_start_aneg - start auto-negotiation for this PHY device | |
474 | * @phydev: the phy_device struct | |
e1393456 | 475 | * |
b3df0da8 RD |
476 | * Description: Sanitizes the settings (if we're not autonegotiating |
477 | * them), and then calls the driver's config_aneg function. | |
478 | * If the PHYCONTROL Layer is operating, we change the state to | |
479 | * reflect the beginning of Auto-negotiation or forcing. | |
e1393456 AF |
480 | */ |
481 | int phy_start_aneg(struct phy_device *phydev) | |
482 | { | |
483 | int err; | |
484 | ||
35b5f6b1 | 485 | mutex_lock(&phydev->lock); |
e1393456 AF |
486 | |
487 | if (AUTONEG_DISABLE == phydev->autoneg) | |
488 | phy_sanitize_settings(phydev); | |
489 | ||
9b3320ef BH |
490 | /* Invalidate LP advertising flags */ |
491 | phydev->lp_advertising = 0; | |
492 | ||
e1393456 | 493 | err = phydev->drv->config_aneg(phydev); |
e1393456 AF |
494 | if (err < 0) |
495 | goto out_unlock; | |
496 | ||
497 | if (phydev->state != PHY_HALTED) { | |
498 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
499 | phydev->state = PHY_AN; | |
500 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
501 | } else { | |
502 | phydev->state = PHY_FORCING; | |
503 | phydev->link_timeout = PHY_FORCE_TIMEOUT; | |
504 | } | |
505 | } | |
506 | ||
507 | out_unlock: | |
35b5f6b1 | 508 | mutex_unlock(&phydev->lock); |
e1393456 AF |
509 | return err; |
510 | } | |
511 | EXPORT_SYMBOL(phy_start_aneg); | |
512 | ||
b3df0da8 RD |
513 | /** |
514 | * phy_start_machine - start PHY state machine tracking | |
515 | * @phydev: the phy_device struct | |
00db8189 | 516 | * |
b3df0da8 | 517 | * Description: The PHY infrastructure can run a state machine |
00db8189 AF |
518 | * which tracks whether the PHY is starting up, negotiating, |
519 | * etc. This function starts the timer which tracks the state | |
29935aeb SS |
520 | * of the PHY. If you want to maintain your own state machine, |
521 | * do not call this function. | |
b3df0da8 | 522 | */ |
29935aeb | 523 | void phy_start_machine(struct phy_device *phydev) |
00db8189 | 524 | { |
bbb47bde | 525 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, HZ); |
00db8189 AF |
526 | } |
527 | ||
b3df0da8 RD |
528 | /** |
529 | * phy_stop_machine - stop the PHY state machine tracking | |
530 | * @phydev: target phy_device struct | |
00db8189 | 531 | * |
b3df0da8 | 532 | * Description: Stops the state machine timer, sets the state to UP |
817acf5e | 533 | * (unless it wasn't up yet). This function must be called BEFORE |
00db8189 AF |
534 | * phy_detach. |
535 | */ | |
536 | void phy_stop_machine(struct phy_device *phydev) | |
537 | { | |
a390d1f3 | 538 | cancel_delayed_work_sync(&phydev->state_queue); |
00db8189 | 539 | |
35b5f6b1 | 540 | mutex_lock(&phydev->lock); |
00db8189 AF |
541 | if (phydev->state > PHY_UP) |
542 | phydev->state = PHY_UP; | |
35b5f6b1 | 543 | mutex_unlock(&phydev->lock); |
00db8189 AF |
544 | } |
545 | ||
b3df0da8 RD |
546 | /** |
547 | * phy_error - enter HALTED state for this PHY device | |
548 | * @phydev: target phy_device struct | |
00db8189 AF |
549 | * |
550 | * Moves the PHY to the HALTED state in response to a read | |
551 | * or write error, and tells the controller the link is down. | |
552 | * Must not be called from interrupt context, or while the | |
553 | * phydev->lock is held. | |
554 | */ | |
9b9a8bfc | 555 | static void phy_error(struct phy_device *phydev) |
00db8189 | 556 | { |
35b5f6b1 | 557 | mutex_lock(&phydev->lock); |
00db8189 | 558 | phydev->state = PHY_HALTED; |
35b5f6b1 | 559 | mutex_unlock(&phydev->lock); |
00db8189 AF |
560 | } |
561 | ||
b3df0da8 RD |
562 | /** |
563 | * phy_interrupt - PHY interrupt handler | |
564 | * @irq: interrupt line | |
565 | * @phy_dat: phy_device pointer | |
e1393456 | 566 | * |
b3df0da8 | 567 | * Description: When a PHY interrupt occurs, the handler disables |
e1393456 AF |
568 | * interrupts, and schedules a work task to clear the interrupt. |
569 | */ | |
7d12e780 | 570 | static irqreturn_t phy_interrupt(int irq, void *phy_dat) |
e1393456 AF |
571 | { |
572 | struct phy_device *phydev = phy_dat; | |
573 | ||
3c3070d7 MR |
574 | if (PHY_HALTED == phydev->state) |
575 | return IRQ_NONE; /* It can't be ours. */ | |
576 | ||
e1393456 AF |
577 | /* The MDIO bus is not allowed to be written in interrupt |
578 | * context, so we need to disable the irq here. A work | |
579 | * queue will write the PHY to disable and clear the | |
2f53e904 SS |
580 | * interrupt, and then reenable the irq line. |
581 | */ | |
e1393456 | 582 | disable_irq_nosync(irq); |
0ac49527 | 583 | atomic_inc(&phydev->irq_disable); |
e1393456 | 584 | |
bbb47bde | 585 | queue_work(system_power_efficient_wq, &phydev->phy_queue); |
e1393456 AF |
586 | |
587 | return IRQ_HANDLED; | |
588 | } | |
589 | ||
b3df0da8 RD |
590 | /** |
591 | * phy_enable_interrupts - Enable the interrupts from the PHY side | |
592 | * @phydev: target phy_device struct | |
593 | */ | |
89ff05ec | 594 | static int phy_enable_interrupts(struct phy_device *phydev) |
00db8189 | 595 | { |
553fe92b | 596 | int err = phy_clear_interrupt(phydev); |
00db8189 | 597 | |
e1393456 AF |
598 | if (err < 0) |
599 | return err; | |
00db8189 | 600 | |
553fe92b | 601 | return phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
00db8189 | 602 | } |
00db8189 | 603 | |
b3df0da8 RD |
604 | /** |
605 | * phy_disable_interrupts - Disable the PHY interrupts from the PHY side | |
606 | * @phydev: target phy_device struct | |
607 | */ | |
89ff05ec | 608 | static int phy_disable_interrupts(struct phy_device *phydev) |
00db8189 AF |
609 | { |
610 | int err; | |
611 | ||
612 | /* Disable PHY interrupts */ | |
613 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
00db8189 AF |
614 | if (err) |
615 | goto phy_err; | |
616 | ||
617 | /* Clear the interrupt */ | |
618 | err = phy_clear_interrupt(phydev); | |
00db8189 AF |
619 | if (err) |
620 | goto phy_err; | |
621 | ||
622 | return 0; | |
623 | ||
624 | phy_err: | |
625 | phy_error(phydev); | |
626 | ||
627 | return err; | |
628 | } | |
e1393456 | 629 | |
b3df0da8 RD |
630 | /** |
631 | * phy_start_interrupts - request and enable interrupts for a PHY device | |
632 | * @phydev: target phy_device struct | |
e1393456 | 633 | * |
b3df0da8 RD |
634 | * Description: Request the interrupt for the given PHY. |
635 | * If this fails, then we set irq to PHY_POLL. | |
e1393456 | 636 | * Otherwise, we enable the interrupts in the PHY. |
e1393456 | 637 | * This should only be called with a valid IRQ number. |
b3df0da8 | 638 | * Returns 0 on success or < 0 on error. |
e1393456 AF |
639 | */ |
640 | int phy_start_interrupts(struct phy_device *phydev) | |
641 | { | |
0ac49527 | 642 | atomic_set(&phydev->irq_disable, 0); |
33c133cc SS |
643 | if (request_irq(phydev->irq, phy_interrupt, 0, "phy_interrupt", |
644 | phydev) < 0) { | |
8d242488 JP |
645 | pr_warn("%s: Can't get IRQ %d (PHY)\n", |
646 | phydev->bus->name, phydev->irq); | |
e1393456 AF |
647 | phydev->irq = PHY_POLL; |
648 | return 0; | |
649 | } | |
650 | ||
e62a768f | 651 | return phy_enable_interrupts(phydev); |
e1393456 AF |
652 | } |
653 | EXPORT_SYMBOL(phy_start_interrupts); | |
654 | ||
b3df0da8 RD |
655 | /** |
656 | * phy_stop_interrupts - disable interrupts from a PHY device | |
657 | * @phydev: target phy_device struct | |
658 | */ | |
e1393456 AF |
659 | int phy_stop_interrupts(struct phy_device *phydev) |
660 | { | |
553fe92b | 661 | int err = phy_disable_interrupts(phydev); |
e1393456 AF |
662 | |
663 | if (err) | |
664 | phy_error(phydev); | |
665 | ||
0ac49527 MR |
666 | free_irq(phydev->irq, phydev); |
667 | ||
2f53e904 | 668 | /* Cannot call flush_scheduled_work() here as desired because |
0ac49527 MR |
669 | * of rtnl_lock(), but we do not really care about what would |
670 | * be done, except from enable_irq(), so cancel any work | |
671 | * possibly pending and take care of the matter below. | |
3c3070d7 | 672 | */ |
28e53bdd | 673 | cancel_work_sync(&phydev->phy_queue); |
2f53e904 | 674 | /* If work indeed has been cancelled, disable_irq() will have |
0ac49527 MR |
675 | * been left unbalanced from phy_interrupt() and enable_irq() |
676 | * has to be called so that other devices on the line work. | |
677 | */ | |
678 | while (atomic_dec_return(&phydev->irq_disable) >= 0) | |
679 | enable_irq(phydev->irq); | |
e1393456 AF |
680 | |
681 | return err; | |
682 | } | |
683 | EXPORT_SYMBOL(phy_stop_interrupts); | |
684 | ||
b3df0da8 RD |
685 | /** |
686 | * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes | |
687 | * @work: work_struct that describes the work to be done | |
688 | */ | |
5ea94e76 | 689 | void phy_change(struct work_struct *work) |
e1393456 | 690 | { |
c4028958 DH |
691 | struct phy_device *phydev = |
692 | container_of(work, struct phy_device, phy_queue); | |
e1393456 | 693 | |
a8729eb3 AG |
694 | if (phydev->drv->did_interrupt && |
695 | !phydev->drv->did_interrupt(phydev)) | |
696 | goto ignore; | |
697 | ||
e62a768f | 698 | if (phy_disable_interrupts(phydev)) |
e1393456 AF |
699 | goto phy_err; |
700 | ||
35b5f6b1 | 701 | mutex_lock(&phydev->lock); |
e1393456 AF |
702 | if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) |
703 | phydev->state = PHY_CHANGELINK; | |
35b5f6b1 | 704 | mutex_unlock(&phydev->lock); |
e1393456 | 705 | |
0ac49527 | 706 | atomic_dec(&phydev->irq_disable); |
e1393456 AF |
707 | enable_irq(phydev->irq); |
708 | ||
709 | /* Reenable interrupts */ | |
e62a768f SS |
710 | if (PHY_HALTED != phydev->state && |
711 | phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED)) | |
e1393456 AF |
712 | goto irq_enable_err; |
713 | ||
a390d1f3 MS |
714 | /* reschedule state queue work to run as soon as possible */ |
715 | cancel_delayed_work_sync(&phydev->state_queue); | |
bbb47bde | 716 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); |
e1393456 AF |
717 | return; |
718 | ||
a8729eb3 AG |
719 | ignore: |
720 | atomic_dec(&phydev->irq_disable); | |
721 | enable_irq(phydev->irq); | |
722 | return; | |
723 | ||
e1393456 AF |
724 | irq_enable_err: |
725 | disable_irq(phydev->irq); | |
0ac49527 | 726 | atomic_inc(&phydev->irq_disable); |
e1393456 AF |
727 | phy_err: |
728 | phy_error(phydev); | |
729 | } | |
730 | ||
b3df0da8 RD |
731 | /** |
732 | * phy_stop - Bring down the PHY link, and stop checking the status | |
733 | * @phydev: target phy_device struct | |
734 | */ | |
e1393456 AF |
735 | void phy_stop(struct phy_device *phydev) |
736 | { | |
35b5f6b1 | 737 | mutex_lock(&phydev->lock); |
e1393456 AF |
738 | |
739 | if (PHY_HALTED == phydev->state) | |
740 | goto out_unlock; | |
741 | ||
2c7b4921 | 742 | if (phy_interrupt_is_valid(phydev)) { |
e1393456 AF |
743 | /* Disable PHY Interrupts */ |
744 | phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
e1393456 | 745 | |
3c3070d7 MR |
746 | /* Clear any pending interrupts */ |
747 | phy_clear_interrupt(phydev); | |
748 | } | |
e1393456 | 749 | |
6daf6531 MR |
750 | phydev->state = PHY_HALTED; |
751 | ||
e1393456 | 752 | out_unlock: |
35b5f6b1 | 753 | mutex_unlock(&phydev->lock); |
3c3070d7 | 754 | |
2f53e904 | 755 | /* Cannot call flush_scheduled_work() here as desired because |
3c3070d7 MR |
756 | * of rtnl_lock(), but PHY_HALTED shall guarantee phy_change() |
757 | * will not reenable interrupts. | |
758 | */ | |
e1393456 | 759 | } |
2f53e904 | 760 | EXPORT_SYMBOL(phy_stop); |
e1393456 | 761 | |
b3df0da8 RD |
762 | /** |
763 | * phy_start - start or restart a PHY device | |
764 | * @phydev: target phy_device struct | |
e1393456 | 765 | * |
b3df0da8 | 766 | * Description: Indicates the attached device's readiness to |
e1393456 AF |
767 | * handle PHY-related work. Used during startup to start the |
768 | * PHY, and after a call to phy_stop() to resume operation. | |
769 | * Also used to indicate the MDIO bus has cleared an error | |
770 | * condition. | |
771 | */ | |
772 | void phy_start(struct phy_device *phydev) | |
773 | { | |
c15e10e7 TB |
774 | bool do_resume = false; |
775 | int err = 0; | |
776 | ||
35b5f6b1 | 777 | mutex_lock(&phydev->lock); |
e1393456 AF |
778 | |
779 | switch (phydev->state) { | |
e109374f FF |
780 | case PHY_STARTING: |
781 | phydev->state = PHY_PENDING; | |
782 | break; | |
783 | case PHY_READY: | |
784 | phydev->state = PHY_UP; | |
785 | break; | |
786 | case PHY_HALTED: | |
c15e10e7 TB |
787 | /* make sure interrupts are re-enabled for the PHY */ |
788 | err = phy_enable_interrupts(phydev); | |
789 | if (err < 0) | |
790 | break; | |
791 | ||
e109374f | 792 | phydev->state = PHY_RESUMING; |
c15e10e7 TB |
793 | do_resume = true; |
794 | break; | |
e109374f FF |
795 | default: |
796 | break; | |
e1393456 | 797 | } |
35b5f6b1 | 798 | mutex_unlock(&phydev->lock); |
c15e10e7 TB |
799 | |
800 | /* if phy was suspended, bring the physical link up again */ | |
801 | if (do_resume) | |
802 | phy_resume(phydev); | |
e1393456 | 803 | } |
e1393456 | 804 | EXPORT_SYMBOL(phy_start); |
67c4f3fa | 805 | |
35b5f6b1 NC |
806 | /** |
807 | * phy_state_machine - Handle the state machine | |
808 | * @work: work_struct that describes the work to be done | |
35b5f6b1 | 809 | */ |
4f9c85a1 | 810 | void phy_state_machine(struct work_struct *work) |
00db8189 | 811 | { |
bf6aede7 | 812 | struct delayed_work *dwork = to_delayed_work(work); |
35b5f6b1 | 813 | struct phy_device *phydev = |
a390d1f3 | 814 | container_of(dwork, struct phy_device, state_queue); |
c15e10e7 | 815 | bool needs_aneg = false, do_suspend = false; |
3e2186e0 | 816 | enum phy_state old_state; |
00db8189 | 817 | int err = 0; |
11e122cb | 818 | int old_link; |
00db8189 | 819 | |
35b5f6b1 | 820 | mutex_lock(&phydev->lock); |
00db8189 | 821 | |
3e2186e0 FF |
822 | old_state = phydev->state; |
823 | ||
2b8f2a28 DM |
824 | if (phydev->drv->link_change_notify) |
825 | phydev->drv->link_change_notify(phydev); | |
826 | ||
e109374f FF |
827 | switch (phydev->state) { |
828 | case PHY_DOWN: | |
829 | case PHY_STARTING: | |
830 | case PHY_READY: | |
831 | case PHY_PENDING: | |
832 | break; | |
833 | case PHY_UP: | |
6e14a5ee | 834 | needs_aneg = true; |
00db8189 | 835 | |
e109374f FF |
836 | phydev->link_timeout = PHY_AN_TIMEOUT; |
837 | ||
838 | break; | |
839 | case PHY_AN: | |
840 | err = phy_read_status(phydev); | |
e109374f | 841 | if (err < 0) |
00db8189 | 842 | break; |
6b655529 | 843 | |
2f53e904 | 844 | /* If the link is down, give up on negotiation for now */ |
e109374f FF |
845 | if (!phydev->link) { |
846 | phydev->state = PHY_NOLINK; | |
847 | netif_carrier_off(phydev->attached_dev); | |
848 | phydev->adjust_link(phydev->attached_dev); | |
849 | break; | |
850 | } | |
6b655529 | 851 | |
2f53e904 | 852 | /* Check if negotiation is done. Break if there's an error */ |
e109374f FF |
853 | err = phy_aneg_done(phydev); |
854 | if (err < 0) | |
855 | break; | |
6b655529 | 856 | |
e109374f FF |
857 | /* If AN is done, we're running */ |
858 | if (err > 0) { | |
859 | phydev->state = PHY_RUNNING; | |
860 | netif_carrier_on(phydev->attached_dev); | |
861 | phydev->adjust_link(phydev->attached_dev); | |
00db8189 | 862 | |
fa8cddaf | 863 | } else if (0 == phydev->link_timeout--) |
6e14a5ee | 864 | needs_aneg = true; |
e109374f FF |
865 | break; |
866 | case PHY_NOLINK: | |
321beec5 AL |
867 | if (phy_interrupt_is_valid(phydev)) |
868 | break; | |
869 | ||
e109374f | 870 | err = phy_read_status(phydev); |
e109374f | 871 | if (err) |
00db8189 | 872 | break; |
00db8189 | 873 | |
e109374f | 874 | if (phydev->link) { |
e46e08b8 BK |
875 | if (AUTONEG_ENABLE == phydev->autoneg) { |
876 | err = phy_aneg_done(phydev); | |
877 | if (err < 0) | |
878 | break; | |
879 | ||
880 | if (!err) { | |
881 | phydev->state = PHY_AN; | |
882 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
883 | break; | |
884 | } | |
885 | } | |
e109374f FF |
886 | phydev->state = PHY_RUNNING; |
887 | netif_carrier_on(phydev->attached_dev); | |
888 | phydev->adjust_link(phydev->attached_dev); | |
889 | } | |
890 | break; | |
891 | case PHY_FORCING: | |
892 | err = genphy_update_link(phydev); | |
e109374f | 893 | if (err) |
00db8189 | 894 | break; |
00db8189 | 895 | |
e109374f FF |
896 | if (phydev->link) { |
897 | phydev->state = PHY_RUNNING; | |
898 | netif_carrier_on(phydev->attached_dev); | |
899 | } else { | |
900 | if (0 == phydev->link_timeout--) | |
6e14a5ee | 901 | needs_aneg = true; |
e109374f | 902 | } |
00db8189 | 903 | |
e109374f FF |
904 | phydev->adjust_link(phydev->attached_dev); |
905 | break; | |
906 | case PHY_RUNNING: | |
11e122cb SX |
907 | /* Only register a CHANGE if we are polling or ignoring |
908 | * interrupts and link changed since latest checking. | |
e109374f | 909 | */ |
11e122cb SX |
910 | if (!phy_interrupt_is_valid(phydev)) { |
911 | old_link = phydev->link; | |
912 | err = phy_read_status(phydev); | |
913 | if (err) | |
914 | break; | |
915 | ||
916 | if (old_link != phydev->link) | |
917 | phydev->state = PHY_CHANGELINK; | |
918 | } | |
e109374f FF |
919 | break; |
920 | case PHY_CHANGELINK: | |
921 | err = phy_read_status(phydev); | |
e109374f | 922 | if (err) |
00db8189 | 923 | break; |
00db8189 | 924 | |
e109374f FF |
925 | if (phydev->link) { |
926 | phydev->state = PHY_RUNNING; | |
927 | netif_carrier_on(phydev->attached_dev); | |
928 | } else { | |
929 | phydev->state = PHY_NOLINK; | |
930 | netif_carrier_off(phydev->attached_dev); | |
931 | } | |
00db8189 | 932 | |
e109374f | 933 | phydev->adjust_link(phydev->attached_dev); |
00db8189 | 934 | |
e109374f FF |
935 | if (phy_interrupt_is_valid(phydev)) |
936 | err = phy_config_interrupt(phydev, | |
2f53e904 | 937 | PHY_INTERRUPT_ENABLED); |
e109374f FF |
938 | break; |
939 | case PHY_HALTED: | |
940 | if (phydev->link) { | |
941 | phydev->link = 0; | |
942 | netif_carrier_off(phydev->attached_dev); | |
00db8189 | 943 | phydev->adjust_link(phydev->attached_dev); |
6e14a5ee | 944 | do_suspend = true; |
e109374f FF |
945 | } |
946 | break; | |
947 | case PHY_RESUMING: | |
e109374f FF |
948 | if (AUTONEG_ENABLE == phydev->autoneg) { |
949 | err = phy_aneg_done(phydev); | |
950 | if (err < 0) | |
00db8189 AF |
951 | break; |
952 | ||
e109374f | 953 | /* err > 0 if AN is done. |
2f53e904 SS |
954 | * Otherwise, it's 0, and we're still waiting for AN |
955 | */ | |
e109374f | 956 | if (err > 0) { |
42caa074 WF |
957 | err = phy_read_status(phydev); |
958 | if (err) | |
959 | break; | |
960 | ||
961 | if (phydev->link) { | |
962 | phydev->state = PHY_RUNNING; | |
963 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 964 | } else { |
42caa074 | 965 | phydev->state = PHY_NOLINK; |
2f53e904 | 966 | } |
42caa074 | 967 | phydev->adjust_link(phydev->attached_dev); |
e109374f FF |
968 | } else { |
969 | phydev->state = PHY_AN; | |
970 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
42caa074 | 971 | } |
e109374f FF |
972 | } else { |
973 | err = phy_read_status(phydev); | |
974 | if (err) | |
975 | break; | |
976 | ||
977 | if (phydev->link) { | |
978 | phydev->state = PHY_RUNNING; | |
979 | netif_carrier_on(phydev->attached_dev); | |
2f53e904 | 980 | } else { |
e109374f | 981 | phydev->state = PHY_NOLINK; |
2f53e904 | 982 | } |
e109374f FF |
983 | phydev->adjust_link(phydev->attached_dev); |
984 | } | |
985 | break; | |
00db8189 AF |
986 | } |
987 | ||
35b5f6b1 | 988 | mutex_unlock(&phydev->lock); |
00db8189 AF |
989 | |
990 | if (needs_aneg) | |
991 | err = phy_start_aneg(phydev); | |
6e14a5ee | 992 | else if (do_suspend) |
be9dad1f SH |
993 | phy_suspend(phydev); |
994 | ||
00db8189 AF |
995 | if (err < 0) |
996 | phy_error(phydev); | |
997 | ||
3e2186e0 FF |
998 | dev_dbg(&phydev->dev, "PHY state change %s -> %s\n", |
999 | phy_state_to_str(old_state), phy_state_to_str(phydev->state)); | |
1000 | ||
bbb47bde | 1001 | queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, |
2f53e904 | 1002 | PHY_STATE_TIME * HZ); |
35b5f6b1 | 1003 | } |
a59a4d19 | 1004 | |
5ea94e76 FF |
1005 | void phy_mac_interrupt(struct phy_device *phydev, int new_link) |
1006 | { | |
1007 | cancel_work_sync(&phydev->phy_queue); | |
1008 | phydev->link = new_link; | |
1009 | schedule_work(&phydev->phy_queue); | |
1010 | } | |
1011 | EXPORT_SYMBOL(phy_mac_interrupt); | |
1012 | ||
a59a4d19 GC |
1013 | static inline void mmd_phy_indirect(struct mii_bus *bus, int prtad, int devad, |
1014 | int addr) | |
1015 | { | |
1016 | /* Write the desired MMD Devad */ | |
1017 | bus->write(bus, addr, MII_MMD_CTRL, devad); | |
1018 | ||
1019 | /* Write the desired MMD register address */ | |
1020 | bus->write(bus, addr, MII_MMD_DATA, prtad); | |
1021 | ||
1022 | /* Select the Function : DATA with no post increment */ | |
1023 | bus->write(bus, addr, MII_MMD_CTRL, (devad | MII_MMD_CTRL_NOINCR)); | |
1024 | } | |
1025 | ||
1026 | /** | |
1027 | * phy_read_mmd_indirect - reads data from the MMD registers | |
0c1d77df | 1028 | * @phydev: The PHY device bus |
a59a4d19 GC |
1029 | * @prtad: MMD Address |
1030 | * @devad: MMD DEVAD | |
1031 | * @addr: PHY address on the MII bus | |
1032 | * | |
1033 | * Description: it reads data from the MMD registers (clause 22 to access to | |
1034 | * clause 45) of the specified phy address. | |
1035 | * To read these register we have: | |
1036 | * 1) Write reg 13 // DEVAD | |
1037 | * 2) Write reg 14 // MMD Address | |
1038 | * 3) Write reg 13 // MMD Data Command for MMD DEVAD | |
1039 | * 3) Read reg 14 // Read MMD data | |
1040 | */ | |
66ce7fb9 | 1041 | int phy_read_mmd_indirect(struct phy_device *phydev, int prtad, |
0c1d77df | 1042 | int devad, int addr) |
a59a4d19 | 1043 | { |
0c1d77df VB |
1044 | struct phy_driver *phydrv = phydev->drv; |
1045 | int value = -1; | |
a59a4d19 | 1046 | |
ef899c07 | 1047 | if (!phydrv->read_mmd_indirect) { |
05a7f582 RK |
1048 | struct mii_bus *bus = phydev->bus; |
1049 | ||
1050 | mutex_lock(&bus->mdio_lock); | |
1051 | mmd_phy_indirect(bus, prtad, devad, addr); | |
0c1d77df VB |
1052 | |
1053 | /* Read the content of the MMD's selected register */ | |
05a7f582 RK |
1054 | value = bus->read(bus, addr, MII_MMD_DATA); |
1055 | mutex_unlock(&bus->mdio_lock); | |
0c1d77df VB |
1056 | } else { |
1057 | value = phydrv->read_mmd_indirect(phydev, prtad, devad, addr); | |
1058 | } | |
1059 | return value; | |
a59a4d19 | 1060 | } |
66ce7fb9 | 1061 | EXPORT_SYMBOL(phy_read_mmd_indirect); |
a59a4d19 GC |
1062 | |
1063 | /** | |
1064 | * phy_write_mmd_indirect - writes data to the MMD registers | |
0c1d77df | 1065 | * @phydev: The PHY device |
a59a4d19 GC |
1066 | * @prtad: MMD Address |
1067 | * @devad: MMD DEVAD | |
1068 | * @addr: PHY address on the MII bus | |
1069 | * @data: data to write in the MMD register | |
1070 | * | |
1071 | * Description: Write data from the MMD registers of the specified | |
1072 | * phy address. | |
1073 | * To write these register we have: | |
1074 | * 1) Write reg 13 // DEVAD | |
1075 | * 2) Write reg 14 // MMD Address | |
1076 | * 3) Write reg 13 // MMD Data Command for MMD DEVAD | |
1077 | * 3) Write reg 14 // Write MMD data | |
1078 | */ | |
66ce7fb9 | 1079 | void phy_write_mmd_indirect(struct phy_device *phydev, int prtad, |
0c1d77df | 1080 | int devad, int addr, u32 data) |
a59a4d19 | 1081 | { |
0c1d77df | 1082 | struct phy_driver *phydrv = phydev->drv; |
a59a4d19 | 1083 | |
ef899c07 | 1084 | if (!phydrv->write_mmd_indirect) { |
05a7f582 RK |
1085 | struct mii_bus *bus = phydev->bus; |
1086 | ||
1087 | mutex_lock(&bus->mdio_lock); | |
1088 | mmd_phy_indirect(bus, prtad, devad, addr); | |
0c1d77df VB |
1089 | |
1090 | /* Write the data into MMD's selected register */ | |
05a7f582 RK |
1091 | bus->write(bus, addr, MII_MMD_DATA, data); |
1092 | mutex_unlock(&bus->mdio_lock); | |
0c1d77df VB |
1093 | } else { |
1094 | phydrv->write_mmd_indirect(phydev, prtad, devad, addr, data); | |
1095 | } | |
a59a4d19 | 1096 | } |
66ce7fb9 | 1097 | EXPORT_SYMBOL(phy_write_mmd_indirect); |
a59a4d19 | 1098 | |
a59a4d19 GC |
1099 | /** |
1100 | * phy_init_eee - init and check the EEE feature | |
1101 | * @phydev: target phy_device struct | |
1102 | * @clk_stop_enable: PHY may stop the clock during LPI | |
1103 | * | |
1104 | * Description: it checks if the Energy-Efficient Ethernet (EEE) | |
1105 | * is supported by looking at the MMD registers 3.20 and 7.60/61 | |
1106 | * and it programs the MMD register 3.0 setting the "Clock stop enable" | |
1107 | * bit if required. | |
1108 | */ | |
1109 | int phy_init_eee(struct phy_device *phydev, bool clk_stop_enable) | |
1110 | { | |
a59a4d19 GC |
1111 | /* According to 802.3az,the EEE is supported only in full duplex-mode. |
1112 | * Also EEE feature is active when core is operating with MII, GMII | |
7e140696 FF |
1113 | * or RGMII (all kinds). Internal PHYs are also allowed to proceed and |
1114 | * should return an error if they do not support EEE. | |
a59a4d19 GC |
1115 | */ |
1116 | if ((phydev->duplex == DUPLEX_FULL) && | |
1117 | ((phydev->interface == PHY_INTERFACE_MODE_MII) || | |
1118 | (phydev->interface == PHY_INTERFACE_MODE_GMII) || | |
32a64161 | 1119 | phy_interface_is_rgmii(phydev) || |
a9f63095 | 1120 | phy_is_internal(phydev))) { |
a59a4d19 GC |
1121 | int eee_lp, eee_cap, eee_adv; |
1122 | u32 lp, cap, adv; | |
4ae6e50c | 1123 | int status; |
a59a4d19 GC |
1124 | |
1125 | /* Read phy status to properly get the right settings */ | |
1126 | status = phy_read_status(phydev); | |
1127 | if (status) | |
1128 | return status; | |
1129 | ||
1130 | /* First check if the EEE ability is supported */ | |
0c1d77df | 1131 | eee_cap = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, |
a59a4d19 | 1132 | MDIO_MMD_PCS, phydev->addr); |
7a4cecf7 GC |
1133 | if (eee_cap <= 0) |
1134 | goto eee_exit_err; | |
a59a4d19 | 1135 | |
b32607dd | 1136 | cap = mmd_eee_cap_to_ethtool_sup_t(eee_cap); |
a59a4d19 | 1137 | if (!cap) |
7a4cecf7 | 1138 | goto eee_exit_err; |
a59a4d19 GC |
1139 | |
1140 | /* Check which link settings negotiated and verify it in | |
1141 | * the EEE advertising registers. | |
1142 | */ | |
0c1d77df | 1143 | eee_lp = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, |
a59a4d19 | 1144 | MDIO_MMD_AN, phydev->addr); |
7a4cecf7 GC |
1145 | if (eee_lp <= 0) |
1146 | goto eee_exit_err; | |
a59a4d19 | 1147 | |
0c1d77df | 1148 | eee_adv = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, |
a59a4d19 | 1149 | MDIO_MMD_AN, phydev->addr); |
7a4cecf7 GC |
1150 | if (eee_adv <= 0) |
1151 | goto eee_exit_err; | |
a59a4d19 | 1152 | |
b32607dd AB |
1153 | adv = mmd_eee_adv_to_ethtool_adv_t(eee_adv); |
1154 | lp = mmd_eee_adv_to_ethtool_adv_t(eee_lp); | |
54da5a8b | 1155 | if (!phy_check_valid(phydev->speed, phydev->duplex, lp & adv)) |
7a4cecf7 | 1156 | goto eee_exit_err; |
a59a4d19 GC |
1157 | |
1158 | if (clk_stop_enable) { | |
1159 | /* Configure the PHY to stop receiving xMII | |
1160 | * clock while it is signaling LPI. | |
1161 | */ | |
0c1d77df | 1162 | int val = phy_read_mmd_indirect(phydev, MDIO_CTRL1, |
a59a4d19 GC |
1163 | MDIO_MMD_PCS, |
1164 | phydev->addr); | |
1165 | if (val < 0) | |
1166 | return val; | |
1167 | ||
1168 | val |= MDIO_PCS_CTRL1_CLKSTOP_EN; | |
0c1d77df VB |
1169 | phy_write_mmd_indirect(phydev, MDIO_CTRL1, |
1170 | MDIO_MMD_PCS, phydev->addr, | |
1171 | val); | |
a59a4d19 GC |
1172 | } |
1173 | ||
e62a768f | 1174 | return 0; /* EEE supported */ |
a59a4d19 | 1175 | } |
7a4cecf7 | 1176 | eee_exit_err: |
e62a768f | 1177 | return -EPROTONOSUPPORT; |
a59a4d19 GC |
1178 | } |
1179 | EXPORT_SYMBOL(phy_init_eee); | |
1180 | ||
1181 | /** | |
1182 | * phy_get_eee_err - report the EEE wake error count | |
1183 | * @phydev: target phy_device struct | |
1184 | * | |
1185 | * Description: it is to report the number of time where the PHY | |
1186 | * failed to complete its normal wake sequence. | |
1187 | */ | |
1188 | int phy_get_eee_err(struct phy_device *phydev) | |
1189 | { | |
0c1d77df | 1190 | return phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_WK_ERR, |
a59a4d19 | 1191 | MDIO_MMD_PCS, phydev->addr); |
a59a4d19 GC |
1192 | } |
1193 | EXPORT_SYMBOL(phy_get_eee_err); | |
1194 | ||
1195 | /** | |
1196 | * phy_ethtool_get_eee - get EEE supported and status | |
1197 | * @phydev: target phy_device struct | |
1198 | * @data: ethtool_eee data | |
1199 | * | |
1200 | * Description: it reportes the Supported/Advertisement/LP Advertisement | |
1201 | * capabilities. | |
1202 | */ | |
1203 | int phy_ethtool_get_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1204 | { | |
1205 | int val; | |
1206 | ||
1207 | /* Get Supported EEE */ | |
0c1d77df | 1208 | val = phy_read_mmd_indirect(phydev, MDIO_PCS_EEE_ABLE, |
a59a4d19 GC |
1209 | MDIO_MMD_PCS, phydev->addr); |
1210 | if (val < 0) | |
1211 | return val; | |
b32607dd | 1212 | data->supported = mmd_eee_cap_to_ethtool_sup_t(val); |
a59a4d19 GC |
1213 | |
1214 | /* Get advertisement EEE */ | |
0c1d77df | 1215 | val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_ADV, |
a59a4d19 GC |
1216 | MDIO_MMD_AN, phydev->addr); |
1217 | if (val < 0) | |
1218 | return val; | |
b32607dd | 1219 | data->advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1220 | |
1221 | /* Get LP advertisement EEE */ | |
0c1d77df | 1222 | val = phy_read_mmd_indirect(phydev, MDIO_AN_EEE_LPABLE, |
a59a4d19 GC |
1223 | MDIO_MMD_AN, phydev->addr); |
1224 | if (val < 0) | |
1225 | return val; | |
b32607dd | 1226 | data->lp_advertised = mmd_eee_adv_to_ethtool_adv_t(val); |
a59a4d19 GC |
1227 | |
1228 | return 0; | |
1229 | } | |
1230 | EXPORT_SYMBOL(phy_ethtool_get_eee); | |
1231 | ||
1232 | /** | |
1233 | * phy_ethtool_set_eee - set EEE supported and status | |
1234 | * @phydev: target phy_device struct | |
1235 | * @data: ethtool_eee data | |
1236 | * | |
1237 | * Description: it is to program the Advertisement EEE register. | |
1238 | */ | |
1239 | int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) | |
1240 | { | |
553fe92b | 1241 | int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised); |
a59a4d19 | 1242 | |
0c1d77df | 1243 | phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, |
a59a4d19 GC |
1244 | phydev->addr, val); |
1245 | ||
1246 | return 0; | |
1247 | } | |
1248 | EXPORT_SYMBOL(phy_ethtool_set_eee); | |
42e836eb MS |
1249 | |
1250 | int phy_ethtool_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1251 | { | |
1252 | if (phydev->drv->set_wol) | |
1253 | return phydev->drv->set_wol(phydev, wol); | |
1254 | ||
1255 | return -EOPNOTSUPP; | |
1256 | } | |
1257 | EXPORT_SYMBOL(phy_ethtool_set_wol); | |
1258 | ||
1259 | void phy_ethtool_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol) | |
1260 | { | |
1261 | if (phydev->drv->get_wol) | |
1262 | phydev->drv->get_wol(phydev, wol); | |
1263 | } | |
1264 | EXPORT_SYMBOL(phy_ethtool_get_wol); |