]>
Commit | Line | Data |
---|---|---|
00db8189 AF |
1 | /* |
2 | * drivers/net/phy/phy.c | |
3 | * | |
4 | * Framework for configuring and reading PHY devices | |
5 | * Based on code in sungem_phy.c and gianfar_phy.c | |
6 | * | |
7 | * Author: Andy Fleming | |
8 | * | |
9 | * Copyright (c) 2004 Freescale Semiconductor, Inc. | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify it | |
12 | * under the terms of the GNU General Public License as published by the | |
13 | * Free Software Foundation; either version 2 of the License, or (at your | |
14 | * option) any later version. | |
15 | * | |
16 | */ | |
17 | #include <linux/config.h> | |
18 | #include <linux/kernel.h> | |
19 | #include <linux/sched.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/errno.h> | |
22 | #include <linux/unistd.h> | |
23 | #include <linux/slab.h> | |
24 | #include <linux/interrupt.h> | |
25 | #include <linux/init.h> | |
26 | #include <linux/delay.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <linux/etherdevice.h> | |
29 | #include <linux/skbuff.h> | |
30 | #include <linux/spinlock.h> | |
31 | #include <linux/mm.h> | |
32 | #include <linux/module.h> | |
00db8189 AF |
33 | #include <linux/mii.h> |
34 | #include <linux/ethtool.h> | |
35 | #include <linux/phy.h> | |
36 | ||
37 | #include <asm/io.h> | |
38 | #include <asm/irq.h> | |
39 | #include <asm/uaccess.h> | |
40 | ||
e1393456 AF |
41 | /* Convenience function to print out the current phy status |
42 | */ | |
43 | void phy_print_status(struct phy_device *phydev) | |
44 | { | |
a4d00f17 | 45 | pr_info("PHY: %s - Link is %s", phydev->dev.bus_id, |
e1393456 AF |
46 | phydev->link ? "Up" : "Down"); |
47 | if (phydev->link) | |
48 | printk(" - %d/%s", phydev->speed, | |
49 | DUPLEX_FULL == phydev->duplex ? | |
50 | "Full" : "Half"); | |
51 | ||
52 | printk("\n"); | |
53 | } | |
54 | EXPORT_SYMBOL(phy_print_status); | |
00db8189 AF |
55 | |
56 | ||
57 | /* Convenience functions for reading/writing a given PHY | |
58 | * register. They MUST NOT be called from interrupt context, | |
59 | * because the bus read/write functions may wait for an interrupt | |
60 | * to conclude the operation. */ | |
61 | int phy_read(struct phy_device *phydev, u16 regnum) | |
62 | { | |
63 | int retval; | |
64 | struct mii_bus *bus = phydev->bus; | |
65 | ||
66 | spin_lock_bh(&bus->mdio_lock); | |
67 | retval = bus->read(bus, phydev->addr, regnum); | |
68 | spin_unlock_bh(&bus->mdio_lock); | |
69 | ||
70 | return retval; | |
71 | } | |
72 | EXPORT_SYMBOL(phy_read); | |
73 | ||
74 | int phy_write(struct phy_device *phydev, u16 regnum, u16 val) | |
75 | { | |
76 | int err; | |
77 | struct mii_bus *bus = phydev->bus; | |
78 | ||
79 | spin_lock_bh(&bus->mdio_lock); | |
80 | err = bus->write(bus, phydev->addr, regnum, val); | |
81 | spin_unlock_bh(&bus->mdio_lock); | |
82 | ||
83 | return err; | |
84 | } | |
85 | EXPORT_SYMBOL(phy_write); | |
86 | ||
87 | ||
88 | int phy_clear_interrupt(struct phy_device *phydev) | |
89 | { | |
90 | int err = 0; | |
91 | ||
92 | if (phydev->drv->ack_interrupt) | |
93 | err = phydev->drv->ack_interrupt(phydev); | |
94 | ||
95 | return err; | |
96 | } | |
97 | ||
98 | ||
99 | int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) | |
100 | { | |
101 | int err = 0; | |
102 | ||
103 | phydev->interrupts = interrupts; | |
104 | if (phydev->drv->config_intr) | |
105 | err = phydev->drv->config_intr(phydev); | |
106 | ||
107 | return err; | |
108 | } | |
109 | ||
110 | ||
111 | /* phy_aneg_done | |
112 | * | |
113 | * description: Reads the status register and returns 0 either if | |
114 | * auto-negotiation is incomplete, or if there was an error. | |
115 | * Returns BMSR_ANEGCOMPLETE if auto-negotiation is done. | |
116 | */ | |
117 | static inline int phy_aneg_done(struct phy_device *phydev) | |
118 | { | |
119 | int retval; | |
120 | ||
121 | retval = phy_read(phydev, MII_BMSR); | |
122 | ||
123 | return (retval < 0) ? retval : (retval & BMSR_ANEGCOMPLETE); | |
124 | } | |
125 | ||
00db8189 AF |
126 | /* A structure for mapping a particular speed and duplex |
127 | * combination to a particular SUPPORTED and ADVERTISED value */ | |
128 | struct phy_setting { | |
129 | int speed; | |
130 | int duplex; | |
131 | u32 setting; | |
132 | }; | |
133 | ||
134 | /* A mapping of all SUPPORTED settings to speed/duplex */ | |
135 | static struct phy_setting settings[] = { | |
136 | { | |
137 | .speed = 10000, | |
138 | .duplex = DUPLEX_FULL, | |
139 | .setting = SUPPORTED_10000baseT_Full, | |
140 | }, | |
141 | { | |
142 | .speed = SPEED_1000, | |
143 | .duplex = DUPLEX_FULL, | |
144 | .setting = SUPPORTED_1000baseT_Full, | |
145 | }, | |
146 | { | |
147 | .speed = SPEED_1000, | |
148 | .duplex = DUPLEX_HALF, | |
149 | .setting = SUPPORTED_1000baseT_Half, | |
150 | }, | |
151 | { | |
152 | .speed = SPEED_100, | |
153 | .duplex = DUPLEX_FULL, | |
154 | .setting = SUPPORTED_100baseT_Full, | |
155 | }, | |
156 | { | |
157 | .speed = SPEED_100, | |
158 | .duplex = DUPLEX_HALF, | |
159 | .setting = SUPPORTED_100baseT_Half, | |
160 | }, | |
161 | { | |
162 | .speed = SPEED_10, | |
163 | .duplex = DUPLEX_FULL, | |
164 | .setting = SUPPORTED_10baseT_Full, | |
165 | }, | |
166 | { | |
167 | .speed = SPEED_10, | |
168 | .duplex = DUPLEX_HALF, | |
169 | .setting = SUPPORTED_10baseT_Half, | |
170 | }, | |
171 | }; | |
172 | ||
173 | #define MAX_NUM_SETTINGS (sizeof(settings)/sizeof(struct phy_setting)) | |
174 | ||
175 | /* phy_find_setting | |
176 | * | |
177 | * description: Searches the settings array for the setting which | |
178 | * matches the desired speed and duplex, and returns the index | |
179 | * of that setting. Returns the index of the last setting if | |
180 | * none of the others match. | |
181 | */ | |
182 | static inline int phy_find_setting(int speed, int duplex) | |
183 | { | |
184 | int idx = 0; | |
185 | ||
186 | while (idx < ARRAY_SIZE(settings) && | |
187 | (settings[idx].speed != speed || | |
188 | settings[idx].duplex != duplex)) | |
189 | idx++; | |
190 | ||
191 | return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; | |
192 | } | |
193 | ||
194 | /* phy_find_valid | |
195 | * idx: The first index in settings[] to search | |
196 | * features: A mask of the valid settings | |
197 | * | |
198 | * description: Returns the index of the first valid setting less | |
199 | * than or equal to the one pointed to by idx, as determined by | |
200 | * the mask in features. Returns the index of the last setting | |
201 | * if nothing else matches. | |
202 | */ | |
203 | static inline int phy_find_valid(int idx, u32 features) | |
204 | { | |
205 | while (idx < MAX_NUM_SETTINGS && !(settings[idx].setting & features)) | |
206 | idx++; | |
207 | ||
208 | return idx < MAX_NUM_SETTINGS ? idx : MAX_NUM_SETTINGS - 1; | |
209 | } | |
210 | ||
211 | /* phy_sanitize_settings | |
212 | * | |
213 | * description: Make sure the PHY is set to supported speeds and | |
214 | * duplexes. Drop down by one in this order: 1000/FULL, | |
215 | * 1000/HALF, 100/FULL, 100/HALF, 10/FULL, 10/HALF | |
216 | */ | |
e1393456 | 217 | void phy_sanitize_settings(struct phy_device *phydev) |
00db8189 AF |
218 | { |
219 | u32 features = phydev->supported; | |
220 | int idx; | |
221 | ||
222 | /* Sanitize settings based on PHY capabilities */ | |
223 | if ((features & SUPPORTED_Autoneg) == 0) | |
224 | phydev->autoneg = 0; | |
225 | ||
226 | idx = phy_find_valid(phy_find_setting(phydev->speed, phydev->duplex), | |
227 | features); | |
228 | ||
229 | phydev->speed = settings[idx].speed; | |
230 | phydev->duplex = settings[idx].duplex; | |
231 | } | |
e1393456 | 232 | EXPORT_SYMBOL(phy_sanitize_settings); |
00db8189 AF |
233 | |
234 | /* phy_ethtool_sset: | |
235 | * A generic ethtool sset function. Handles all the details | |
236 | * | |
237 | * A few notes about parameter checking: | |
238 | * - We don't set port or transceiver, so we don't care what they | |
239 | * were set to. | |
240 | * - phy_start_aneg() will make sure forced settings are sane, and | |
241 | * choose the next best ones from the ones selected, so we don't | |
242 | * care if ethtool tries to give us bad values | |
e1393456 | 243 | * |
00db8189 AF |
244 | */ |
245 | int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
246 | { | |
247 | if (cmd->phy_address != phydev->addr) | |
248 | return -EINVAL; | |
249 | ||
250 | /* We make sure that we don't pass unsupported | |
251 | * values in to the PHY */ | |
252 | cmd->advertising &= phydev->supported; | |
253 | ||
254 | /* Verify the settings we care about. */ | |
255 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) | |
256 | return -EINVAL; | |
257 | ||
258 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) | |
259 | return -EINVAL; | |
260 | ||
261 | if (cmd->autoneg == AUTONEG_DISABLE | |
262 | && ((cmd->speed != SPEED_1000 | |
263 | && cmd->speed != SPEED_100 | |
264 | && cmd->speed != SPEED_10) | |
265 | || (cmd->duplex != DUPLEX_HALF | |
266 | && cmd->duplex != DUPLEX_FULL))) | |
267 | return -EINVAL; | |
268 | ||
269 | phydev->autoneg = cmd->autoneg; | |
270 | ||
271 | phydev->speed = cmd->speed; | |
272 | ||
273 | phydev->advertising = cmd->advertising; | |
274 | ||
275 | if (AUTONEG_ENABLE == cmd->autoneg) | |
276 | phydev->advertising |= ADVERTISED_Autoneg; | |
277 | else | |
278 | phydev->advertising &= ~ADVERTISED_Autoneg; | |
279 | ||
280 | phydev->duplex = cmd->duplex; | |
281 | ||
282 | /* Restart the PHY */ | |
283 | phy_start_aneg(phydev); | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) | |
289 | { | |
290 | cmd->supported = phydev->supported; | |
291 | ||
292 | cmd->advertising = phydev->advertising; | |
293 | ||
294 | cmd->speed = phydev->speed; | |
295 | cmd->duplex = phydev->duplex; | |
296 | cmd->port = PORT_MII; | |
297 | cmd->phy_address = phydev->addr; | |
298 | cmd->transceiver = XCVR_EXTERNAL; | |
299 | cmd->autoneg = phydev->autoneg; | |
300 | ||
301 | return 0; | |
302 | } | |
303 | ||
304 | ||
305 | /* Note that this function is currently incompatible with the | |
306 | * PHYCONTROL layer. It changes registers without regard to | |
307 | * current state. Use at own risk | |
308 | */ | |
309 | int phy_mii_ioctl(struct phy_device *phydev, | |
310 | struct mii_ioctl_data *mii_data, int cmd) | |
311 | { | |
312 | u16 val = mii_data->val_in; | |
313 | ||
314 | switch (cmd) { | |
315 | case SIOCGMIIPHY: | |
316 | mii_data->phy_id = phydev->addr; | |
317 | break; | |
318 | case SIOCGMIIREG: | |
319 | mii_data->val_out = phy_read(phydev, mii_data->reg_num); | |
320 | break; | |
321 | ||
322 | case SIOCSMIIREG: | |
323 | if (!capable(CAP_NET_ADMIN)) | |
324 | return -EPERM; | |
325 | ||
326 | if (mii_data->phy_id == phydev->addr) { | |
327 | switch(mii_data->reg_num) { | |
328 | case MII_BMCR: | |
329 | if (val & (BMCR_RESET|BMCR_ANENABLE)) | |
330 | phydev->autoneg = AUTONEG_DISABLE; | |
331 | else | |
332 | phydev->autoneg = AUTONEG_ENABLE; | |
333 | if ((!phydev->autoneg) && (val & BMCR_FULLDPLX)) | |
334 | phydev->duplex = DUPLEX_FULL; | |
335 | else | |
336 | phydev->duplex = DUPLEX_HALF; | |
337 | break; | |
338 | case MII_ADVERTISE: | |
339 | phydev->advertising = val; | |
340 | break; | |
341 | default: | |
342 | /* do nothing */ | |
343 | break; | |
344 | } | |
345 | } | |
346 | ||
347 | phy_write(phydev, mii_data->reg_num, val); | |
348 | ||
349 | if (mii_data->reg_num == MII_BMCR | |
350 | && val & BMCR_RESET | |
351 | && phydev->drv->config_init) | |
352 | phydev->drv->config_init(phydev); | |
353 | break; | |
354 | } | |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
e1393456 AF |
359 | /* phy_start_aneg |
360 | * | |
361 | * description: Sanitizes the settings (if we're not | |
362 | * autonegotiating them), and then calls the driver's | |
363 | * config_aneg function. If the PHYCONTROL Layer is operating, | |
364 | * we change the state to reflect the beginning of | |
365 | * Auto-negotiation or forcing. | |
366 | */ | |
367 | int phy_start_aneg(struct phy_device *phydev) | |
368 | { | |
369 | int err; | |
370 | ||
371 | spin_lock(&phydev->lock); | |
372 | ||
373 | if (AUTONEG_DISABLE == phydev->autoneg) | |
374 | phy_sanitize_settings(phydev); | |
375 | ||
376 | err = phydev->drv->config_aneg(phydev); | |
377 | ||
e1393456 AF |
378 | if (err < 0) |
379 | goto out_unlock; | |
380 | ||
381 | if (phydev->state != PHY_HALTED) { | |
382 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
383 | phydev->state = PHY_AN; | |
384 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
385 | } else { | |
386 | phydev->state = PHY_FORCING; | |
387 | phydev->link_timeout = PHY_FORCE_TIMEOUT; | |
388 | } | |
389 | } | |
390 | ||
391 | out_unlock: | |
e1393456 AF |
392 | spin_unlock(&phydev->lock); |
393 | return err; | |
394 | } | |
395 | EXPORT_SYMBOL(phy_start_aneg); | |
396 | ||
397 | ||
e1393456 AF |
398 | static void phy_change(void *data); |
399 | static void phy_timer(unsigned long data); | |
400 | ||
00db8189 AF |
401 | /* phy_start_machine: |
402 | * | |
403 | * description: The PHY infrastructure can run a state machine | |
404 | * which tracks whether the PHY is starting up, negotiating, | |
405 | * etc. This function starts the timer which tracks the state | |
406 | * of the PHY. If you want to be notified when the state | |
407 | * changes, pass in the callback, otherwise, pass NULL. If you | |
408 | * want to maintain your own state machine, do not call this | |
409 | * function. */ | |
410 | void phy_start_machine(struct phy_device *phydev, | |
411 | void (*handler)(struct net_device *)) | |
412 | { | |
413 | phydev->adjust_state = handler; | |
414 | ||
415 | init_timer(&phydev->phy_timer); | |
416 | phydev->phy_timer.function = &phy_timer; | |
417 | phydev->phy_timer.data = (unsigned long) phydev; | |
418 | mod_timer(&phydev->phy_timer, jiffies + HZ); | |
419 | } | |
420 | ||
421 | /* phy_stop_machine | |
422 | * | |
423 | * description: Stops the state machine timer, sets the state to | |
424 | * UP (unless it wasn't up yet), and then frees the interrupt, | |
425 | * if it is in use. This function must be called BEFORE | |
426 | * phy_detach. | |
427 | */ | |
428 | void phy_stop_machine(struct phy_device *phydev) | |
429 | { | |
430 | del_timer_sync(&phydev->phy_timer); | |
431 | ||
432 | spin_lock(&phydev->lock); | |
433 | if (phydev->state > PHY_UP) | |
434 | phydev->state = PHY_UP; | |
435 | spin_unlock(&phydev->lock); | |
436 | ||
437 | if (phydev->irq != PHY_POLL) | |
438 | phy_stop_interrupts(phydev); | |
439 | ||
440 | phydev->adjust_state = NULL; | |
441 | } | |
442 | ||
e1393456 AF |
443 | /* phy_force_reduction |
444 | * | |
445 | * description: Reduces the speed/duplex settings by | |
446 | * one notch. The order is so: | |
447 | * 1000/FULL, 1000/HALF, 100/FULL, 100/HALF, | |
448 | * 10/FULL, 10/HALF. The function bottoms out at 10/HALF. | |
449 | */ | |
450 | static void phy_force_reduction(struct phy_device *phydev) | |
451 | { | |
452 | int idx; | |
453 | ||
454 | idx = phy_find_setting(phydev->speed, phydev->duplex); | |
455 | ||
456 | idx++; | |
457 | ||
458 | idx = phy_find_valid(idx, phydev->supported); | |
459 | ||
460 | phydev->speed = settings[idx].speed; | |
461 | phydev->duplex = settings[idx].duplex; | |
462 | ||
463 | pr_info("Trying %d/%s\n", phydev->speed, | |
464 | DUPLEX_FULL == phydev->duplex ? | |
465 | "FULL" : "HALF"); | |
466 | } | |
467 | ||
468 | ||
00db8189 AF |
469 | /* phy_error: |
470 | * | |
471 | * Moves the PHY to the HALTED state in response to a read | |
472 | * or write error, and tells the controller the link is down. | |
473 | * Must not be called from interrupt context, or while the | |
474 | * phydev->lock is held. | |
475 | */ | |
476 | void phy_error(struct phy_device *phydev) | |
477 | { | |
478 | spin_lock(&phydev->lock); | |
479 | phydev->state = PHY_HALTED; | |
480 | spin_unlock(&phydev->lock); | |
481 | } | |
482 | ||
e1393456 AF |
483 | /* phy_interrupt |
484 | * | |
485 | * description: When a PHY interrupt occurs, the handler disables | |
486 | * interrupts, and schedules a work task to clear the interrupt. | |
487 | */ | |
488 | static irqreturn_t phy_interrupt(int irq, void *phy_dat, struct pt_regs *regs) | |
489 | { | |
490 | struct phy_device *phydev = phy_dat; | |
491 | ||
492 | /* The MDIO bus is not allowed to be written in interrupt | |
493 | * context, so we need to disable the irq here. A work | |
494 | * queue will write the PHY to disable and clear the | |
495 | * interrupt, and then reenable the irq line. */ | |
496 | disable_irq_nosync(irq); | |
497 | ||
498 | schedule_work(&phydev->phy_queue); | |
499 | ||
500 | return IRQ_HANDLED; | |
501 | } | |
502 | ||
503 | /* Enable the interrupts from the PHY side */ | |
504 | int phy_enable_interrupts(struct phy_device *phydev) | |
00db8189 AF |
505 | { |
506 | int err; | |
507 | ||
e1393456 | 508 | err = phy_clear_interrupt(phydev); |
00db8189 | 509 | |
e1393456 AF |
510 | if (err < 0) |
511 | return err; | |
00db8189 | 512 | |
e1393456 | 513 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); |
00db8189 AF |
514 | |
515 | return err; | |
516 | } | |
e1393456 | 517 | EXPORT_SYMBOL(phy_enable_interrupts); |
00db8189 AF |
518 | |
519 | /* Disable the PHY interrupts from the PHY side */ | |
e1393456 | 520 | int phy_disable_interrupts(struct phy_device *phydev) |
00db8189 AF |
521 | { |
522 | int err; | |
523 | ||
524 | /* Disable PHY interrupts */ | |
525 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
526 | ||
527 | if (err) | |
528 | goto phy_err; | |
529 | ||
530 | /* Clear the interrupt */ | |
531 | err = phy_clear_interrupt(phydev); | |
532 | ||
533 | if (err) | |
534 | goto phy_err; | |
535 | ||
536 | return 0; | |
537 | ||
538 | phy_err: | |
539 | phy_error(phydev); | |
540 | ||
541 | return err; | |
542 | } | |
e1393456 AF |
543 | EXPORT_SYMBOL(phy_disable_interrupts); |
544 | ||
545 | /* phy_start_interrupts | |
546 | * | |
547 | * description: Request the interrupt for the given PHY. If | |
548 | * this fails, then we set irq to PHY_POLL. | |
549 | * Otherwise, we enable the interrupts in the PHY. | |
550 | * Returns 0 on success. | |
551 | * This should only be called with a valid IRQ number. | |
552 | */ | |
553 | int phy_start_interrupts(struct phy_device *phydev) | |
554 | { | |
555 | int err = 0; | |
556 | ||
557 | INIT_WORK(&phydev->phy_queue, phy_change, phydev); | |
558 | ||
559 | if (request_irq(phydev->irq, phy_interrupt, | |
560 | SA_SHIRQ, | |
561 | "phy_interrupt", | |
562 | phydev) < 0) { | |
563 | printk(KERN_WARNING "%s: Can't get IRQ %d (PHY)\n", | |
564 | phydev->bus->name, | |
565 | phydev->irq); | |
566 | phydev->irq = PHY_POLL; | |
567 | return 0; | |
568 | } | |
569 | ||
570 | err = phy_enable_interrupts(phydev); | |
571 | ||
572 | return err; | |
573 | } | |
574 | EXPORT_SYMBOL(phy_start_interrupts); | |
575 | ||
576 | int phy_stop_interrupts(struct phy_device *phydev) | |
577 | { | |
578 | int err; | |
579 | ||
580 | err = phy_disable_interrupts(phydev); | |
581 | ||
582 | if (err) | |
583 | phy_error(phydev); | |
584 | ||
585 | free_irq(phydev->irq, phydev); | |
586 | ||
587 | return err; | |
588 | } | |
589 | EXPORT_SYMBOL(phy_stop_interrupts); | |
590 | ||
591 | ||
592 | /* Scheduled by the phy_interrupt/timer to handle PHY changes */ | |
593 | static void phy_change(void *data) | |
594 | { | |
595 | int err; | |
596 | struct phy_device *phydev = data; | |
597 | ||
598 | err = phy_disable_interrupts(phydev); | |
599 | ||
600 | if (err) | |
601 | goto phy_err; | |
602 | ||
603 | spin_lock(&phydev->lock); | |
604 | if ((PHY_RUNNING == phydev->state) || (PHY_NOLINK == phydev->state)) | |
605 | phydev->state = PHY_CHANGELINK; | |
606 | spin_unlock(&phydev->lock); | |
607 | ||
608 | enable_irq(phydev->irq); | |
609 | ||
610 | /* Reenable interrupts */ | |
611 | err = phy_config_interrupt(phydev, PHY_INTERRUPT_ENABLED); | |
612 | ||
613 | if (err) | |
614 | goto irq_enable_err; | |
615 | ||
616 | return; | |
617 | ||
618 | irq_enable_err: | |
619 | disable_irq(phydev->irq); | |
620 | phy_err: | |
621 | phy_error(phydev); | |
622 | } | |
623 | ||
624 | /* Bring down the PHY link, and stop checking the status. */ | |
625 | void phy_stop(struct phy_device *phydev) | |
626 | { | |
627 | spin_lock(&phydev->lock); | |
628 | ||
629 | if (PHY_HALTED == phydev->state) | |
630 | goto out_unlock; | |
631 | ||
632 | if (phydev->irq != PHY_POLL) { | |
633 | /* Clear any pending interrupts */ | |
634 | phy_clear_interrupt(phydev); | |
635 | ||
636 | /* Disable PHY Interrupts */ | |
637 | phy_config_interrupt(phydev, PHY_INTERRUPT_DISABLED); | |
638 | } | |
639 | ||
640 | phydev->state = PHY_HALTED; | |
641 | ||
642 | out_unlock: | |
643 | spin_unlock(&phydev->lock); | |
644 | } | |
645 | ||
646 | ||
647 | /* phy_start | |
648 | * | |
649 | * description: Indicates the attached device's readiness to | |
650 | * handle PHY-related work. Used during startup to start the | |
651 | * PHY, and after a call to phy_stop() to resume operation. | |
652 | * Also used to indicate the MDIO bus has cleared an error | |
653 | * condition. | |
654 | */ | |
655 | void phy_start(struct phy_device *phydev) | |
656 | { | |
657 | spin_lock(&phydev->lock); | |
658 | ||
659 | switch (phydev->state) { | |
660 | case PHY_STARTING: | |
661 | phydev->state = PHY_PENDING; | |
662 | break; | |
663 | case PHY_READY: | |
664 | phydev->state = PHY_UP; | |
665 | break; | |
666 | case PHY_HALTED: | |
667 | phydev->state = PHY_RESUMING; | |
668 | default: | |
669 | break; | |
670 | } | |
671 | spin_unlock(&phydev->lock); | |
672 | } | |
673 | EXPORT_SYMBOL(phy_stop); | |
674 | EXPORT_SYMBOL(phy_start); | |
67c4f3fa | 675 | |
00db8189 AF |
676 | /* PHY timer which handles the state machine */ |
677 | static void phy_timer(unsigned long data) | |
678 | { | |
679 | struct phy_device *phydev = (struct phy_device *)data; | |
680 | int needs_aneg = 0; | |
681 | int err = 0; | |
682 | ||
683 | spin_lock(&phydev->lock); | |
684 | ||
685 | if (phydev->adjust_state) | |
686 | phydev->adjust_state(phydev->attached_dev); | |
687 | ||
688 | switch(phydev->state) { | |
689 | case PHY_DOWN: | |
690 | case PHY_STARTING: | |
691 | case PHY_READY: | |
692 | case PHY_PENDING: | |
693 | break; | |
694 | case PHY_UP: | |
695 | needs_aneg = 1; | |
696 | ||
697 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
698 | ||
699 | break; | |
700 | case PHY_AN: | |
701 | /* Check if negotiation is done. Break | |
702 | * if there's an error */ | |
703 | err = phy_aneg_done(phydev); | |
704 | if (err < 0) | |
705 | break; | |
706 | ||
707 | /* If auto-negotiation is done, we change to | |
708 | * either RUNNING, or NOLINK */ | |
709 | if (err > 0) { | |
710 | err = phy_read_status(phydev); | |
711 | ||
712 | if (err) | |
713 | break; | |
714 | ||
715 | if (phydev->link) { | |
716 | phydev->state = PHY_RUNNING; | |
717 | netif_carrier_on(phydev->attached_dev); | |
718 | } else { | |
719 | phydev->state = PHY_NOLINK; | |
720 | netif_carrier_off(phydev->attached_dev); | |
721 | } | |
722 | ||
723 | phydev->adjust_link(phydev->attached_dev); | |
724 | ||
725 | } else if (0 == phydev->link_timeout--) { | |
726 | /* The counter expired, so either we | |
727 | * switch to forced mode, or the | |
728 | * magic_aneg bit exists, and we try aneg | |
729 | * again */ | |
730 | if (!(phydev->drv->flags & PHY_HAS_MAGICANEG)) { | |
731 | int idx; | |
732 | ||
733 | /* We'll start from the | |
734 | * fastest speed, and work | |
735 | * our way down */ | |
736 | idx = phy_find_valid(0, | |
737 | phydev->supported); | |
738 | ||
739 | phydev->speed = settings[idx].speed; | |
740 | phydev->duplex = settings[idx].duplex; | |
741 | ||
742 | phydev->autoneg = AUTONEG_DISABLE; | |
743 | phydev->state = PHY_FORCING; | |
744 | phydev->link_timeout = | |
745 | PHY_FORCE_TIMEOUT; | |
746 | ||
747 | pr_info("Trying %d/%s\n", | |
748 | phydev->speed, | |
749 | DUPLEX_FULL == | |
750 | phydev->duplex ? | |
751 | "FULL" : "HALF"); | |
752 | } | |
753 | ||
754 | needs_aneg = 1; | |
755 | } | |
756 | break; | |
757 | case PHY_NOLINK: | |
758 | err = phy_read_status(phydev); | |
759 | ||
760 | if (err) | |
761 | break; | |
762 | ||
763 | if (phydev->link) { | |
764 | phydev->state = PHY_RUNNING; | |
765 | netif_carrier_on(phydev->attached_dev); | |
766 | phydev->adjust_link(phydev->attached_dev); | |
767 | } | |
768 | break; | |
769 | case PHY_FORCING: | |
770 | err = phy_read_status(phydev); | |
771 | ||
772 | if (err) | |
773 | break; | |
774 | ||
775 | if (phydev->link) { | |
776 | phydev->state = PHY_RUNNING; | |
777 | netif_carrier_on(phydev->attached_dev); | |
778 | } else { | |
779 | if (0 == phydev->link_timeout--) { | |
780 | phy_force_reduction(phydev); | |
781 | needs_aneg = 1; | |
782 | } | |
783 | } | |
784 | ||
785 | phydev->adjust_link(phydev->attached_dev); | |
786 | break; | |
787 | case PHY_RUNNING: | |
788 | /* Only register a CHANGE if we are | |
789 | * polling */ | |
790 | if (PHY_POLL == phydev->irq) | |
791 | phydev->state = PHY_CHANGELINK; | |
792 | break; | |
793 | case PHY_CHANGELINK: | |
794 | err = phy_read_status(phydev); | |
795 | ||
796 | if (err) | |
797 | break; | |
798 | ||
799 | if (phydev->link) { | |
800 | phydev->state = PHY_RUNNING; | |
801 | netif_carrier_on(phydev->attached_dev); | |
802 | } else { | |
803 | phydev->state = PHY_NOLINK; | |
804 | netif_carrier_off(phydev->attached_dev); | |
805 | } | |
806 | ||
807 | phydev->adjust_link(phydev->attached_dev); | |
808 | ||
809 | if (PHY_POLL != phydev->irq) | |
810 | err = phy_config_interrupt(phydev, | |
811 | PHY_INTERRUPT_ENABLED); | |
812 | break; | |
813 | case PHY_HALTED: | |
814 | if (phydev->link) { | |
815 | phydev->link = 0; | |
816 | netif_carrier_off(phydev->attached_dev); | |
817 | phydev->adjust_link(phydev->attached_dev); | |
818 | } | |
819 | break; | |
820 | case PHY_RESUMING: | |
821 | ||
822 | err = phy_clear_interrupt(phydev); | |
823 | ||
824 | if (err) | |
825 | break; | |
826 | ||
827 | err = phy_config_interrupt(phydev, | |
828 | PHY_INTERRUPT_ENABLED); | |
829 | ||
830 | if (err) | |
831 | break; | |
832 | ||
833 | if (AUTONEG_ENABLE == phydev->autoneg) { | |
834 | err = phy_aneg_done(phydev); | |
835 | if (err < 0) | |
836 | break; | |
837 | ||
838 | /* err > 0 if AN is done. | |
839 | * Otherwise, it's 0, and we're | |
840 | * still waiting for AN */ | |
841 | if (err > 0) { | |
842 | phydev->state = PHY_RUNNING; | |
843 | } else { | |
844 | phydev->state = PHY_AN; | |
845 | phydev->link_timeout = PHY_AN_TIMEOUT; | |
846 | } | |
847 | } else | |
848 | phydev->state = PHY_RUNNING; | |
849 | break; | |
850 | } | |
851 | ||
852 | spin_unlock(&phydev->lock); | |
853 | ||
854 | if (needs_aneg) | |
855 | err = phy_start_aneg(phydev); | |
856 | ||
857 | if (err < 0) | |
858 | phy_error(phydev); | |
859 | ||
860 | mod_timer(&phydev->phy_timer, jiffies + PHY_STATE_TIME * HZ); | |
861 | } | |
862 |