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WIP FPC-III support
[linux/fpc-iii.git] / drivers / net / phy / dp83640.c
blob0d79f68f301c6146aa06bcfdfa0bf7e0e13d78ad
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Driver for the National Semiconductor DP83640 PHYTER
4 *
5 * Copyright (C) 2010 OMICRON electronics GmbH
6 */
7
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10 #include <linux/crc32.h>
11 #include <linux/ethtool.h>
12 #include <linux/kernel.h>
13 #include <linux/list.h>
14 #include <linux/mii.h>
15 #include <linux/module.h>
16 #include <linux/net_tstamp.h>
17 #include <linux/netdevice.h>
18 #include <linux/if_vlan.h>
19 #include <linux/phy.h>
20 #include <linux/ptp_classify.h>
21 #include <linux/ptp_clock_kernel.h>
22
23 #include "dp83640_reg.h"
24
25 #define DP83640_PHY_ID 0x20005ce1
26 #define PAGESEL 0x13
27 #define MAX_RXTS 64
28 #define N_EXT_TS 6
29 #define N_PER_OUT 7
30 #define PSF_PTPVER 2
31 #define PSF_EVNT 0x4000
32 #define PSF_RX 0x2000
33 #define PSF_TX 0x1000
34 #define EXT_EVENT 1
35 #define CAL_EVENT 7
36 #define CAL_TRIGGER 1
37 #define DP83640_N_PINS 12
38
39 #define MII_DP83640_MICR 0x11
40 #define MII_DP83640_MISR 0x12
41
42 #define MII_DP83640_MICR_OE 0x1
43 #define MII_DP83640_MICR_IE 0x2
44
45 #define MII_DP83640_MISR_RHF_INT_EN 0x01
46 #define MII_DP83640_MISR_FHF_INT_EN 0x02
47 #define MII_DP83640_MISR_ANC_INT_EN 0x04
48 #define MII_DP83640_MISR_DUP_INT_EN 0x08
49 #define MII_DP83640_MISR_SPD_INT_EN 0x10
50 #define MII_DP83640_MISR_LINK_INT_EN 0x20
51 #define MII_DP83640_MISR_ED_INT_EN 0x40
52 #define MII_DP83640_MISR_LQ_INT_EN 0x80
53 #define MII_DP83640_MISR_ANC_INT 0x400
54 #define MII_DP83640_MISR_DUP_INT 0x800
55 #define MII_DP83640_MISR_SPD_INT 0x1000
56 #define MII_DP83640_MISR_LINK_INT 0x2000
57 #define MII_DP83640_MISR_INT_MASK (MII_DP83640_MISR_ANC_INT |\
58 MII_DP83640_MISR_DUP_INT |\
59 MII_DP83640_MISR_SPD_INT |\
60 MII_DP83640_MISR_LINK_INT)
61
62 /* phyter seems to miss the mark by 16 ns */
63 #define ADJTIME_FIX 16
64
65 #define SKB_TIMESTAMP_TIMEOUT 2 /* jiffies */
66
67 #if defined(__BIG_ENDIAN)
68 #define ENDIAN_FLAG 0
69 #elif defined(__LITTLE_ENDIAN)
70 #define ENDIAN_FLAG PSF_ENDIAN
71 #endif
72
73 struct dp83640_skb_info {
74 int ptp_type;
75 unsigned long tmo;
76 };
77
78 struct phy_rxts {
79 u16 ns_lo; /* ns[15:0] */
80 u16 ns_hi; /* overflow[1:0], ns[29:16] */
81 u16 sec_lo; /* sec[15:0] */
82 u16 sec_hi; /* sec[31:16] */
83 u16 seqid; /* sequenceId[15:0] */
84 u16 msgtype; /* messageType[3:0], hash[11:0] */
85 };
86
87 struct phy_txts {
88 u16 ns_lo; /* ns[15:0] */
89 u16 ns_hi; /* overflow[1:0], ns[29:16] */
90 u16 sec_lo; /* sec[15:0] */
91 u16 sec_hi; /* sec[31:16] */
92 };
93
94 struct rxts {
95 struct list_head list;
96 unsigned long tmo;
97 u64 ns;
98 u16 seqid;
99 u8 msgtype;
100 u16 hash;
101 };
102
103 struct dp83640_clock;
104
105 struct dp83640_private {
106 struct list_head list;
107 struct dp83640_clock *clock;
108 struct phy_device *phydev;
109 struct mii_timestamper mii_ts;
110 struct delayed_work ts_work;
111 int hwts_tx_en;
112 int hwts_rx_en;
113 int layer;
114 int version;
115 /* remember state of cfg0 during calibration */
116 int cfg0;
117 /* remember the last event time stamp */
118 struct phy_txts edata;
119 /* list of rx timestamps */
120 struct list_head rxts;
121 struct list_head rxpool;
122 struct rxts rx_pool_data[MAX_RXTS];
123 /* protects above three fields from concurrent access */
124 spinlock_t rx_lock;
125 /* queues of incoming and outgoing packets */
126 struct sk_buff_head rx_queue;
127 struct sk_buff_head tx_queue;
128 };
129
130 struct dp83640_clock {
131 /* keeps the instance in the 'phyter_clocks' list */
132 struct list_head list;
133 /* we create one clock instance per MII bus */
134 struct mii_bus *bus;
135 /* protects extended registers from concurrent access */
136 struct mutex extreg_lock;
137 /* remembers which page was last selected */
138 int page;
139 /* our advertised capabilities */
140 struct ptp_clock_info caps;
141 /* protects the three fields below from concurrent access */
142 struct mutex clock_lock;
143 /* the one phyter from which we shall read */
144 struct dp83640_private *chosen;
145 /* list of the other attached phyters, not chosen */
146 struct list_head phylist;
147 /* reference to our PTP hardware clock */
148 struct ptp_clock *ptp_clock;
149 };
150
151 /* globals */
152
153 enum {
154 CALIBRATE_GPIO,
155 PEROUT_GPIO,
156 EXTTS0_GPIO,
157 EXTTS1_GPIO,
158 EXTTS2_GPIO,
159 EXTTS3_GPIO,
160 EXTTS4_GPIO,
161 EXTTS5_GPIO,
162 GPIO_TABLE_SIZE
163 };
164
165 static int chosen_phy = -1;
166 static ushort gpio_tab[GPIO_TABLE_SIZE] = {
167 1, 2, 3, 4, 8, 9, 10, 11
168 };
169
170 module_param(chosen_phy, int, 0444);
171 module_param_array(gpio_tab, ushort, NULL, 0444);
172
173 MODULE_PARM_DESC(chosen_phy, \
174 "The address of the PHY to use for the ancillary clock features");
175 MODULE_PARM_DESC(gpio_tab, \
176 "Which GPIO line to use for which purpose: cal,perout,extts1,...,extts6");
177
178 static void dp83640_gpio_defaults(struct ptp_pin_desc *pd)
179 {
180 int i, index;
181
182 for (i = 0; i < DP83640_N_PINS; i++) {
183 snprintf(pd[i].name, sizeof(pd[i].name), "GPIO%d", 1 + i);
184 pd[i].index = i;
185 }
186
187 for (i = 0; i < GPIO_TABLE_SIZE; i++) {
188 if (gpio_tab[i] < 1 || gpio_tab[i] > DP83640_N_PINS) {
189 pr_err("gpio_tab[%d]=%hu out of range", i, gpio_tab[i]);
190 return;
191 }
192 }
193
194 index = gpio_tab[CALIBRATE_GPIO] - 1;
195 pd[index].func = PTP_PF_PHYSYNC;
196 pd[index].chan = 0;
197
198 index = gpio_tab[PEROUT_GPIO] - 1;
199 pd[index].func = PTP_PF_PEROUT;
200 pd[index].chan = 0;
201
202 for (i = EXTTS0_GPIO; i < GPIO_TABLE_SIZE; i++) {
203 index = gpio_tab[i] - 1;
204 pd[index].func = PTP_PF_EXTTS;
205 pd[index].chan = i - EXTTS0_GPIO;
206 }
207 }
208
209 /* a list of clocks and a mutex to protect it */
210 static LIST_HEAD(phyter_clocks);
211 static DEFINE_MUTEX(phyter_clocks_lock);
212
213 static void rx_timestamp_work(struct work_struct *work);
214
215 /* extended register access functions */
216
217 #define BROADCAST_ADDR 31
218
219 static inline int broadcast_write(struct phy_device *phydev, u32 regnum,
220 u16 val)
221 {
222 return mdiobus_write(phydev->mdio.bus, BROADCAST_ADDR, regnum, val);
223 }
224
225 /* Caller must hold extreg_lock. */
226 static int ext_read(struct phy_device *phydev, int page, u32 regnum)
227 {
228 struct dp83640_private *dp83640 = phydev->priv;
229 int val;
230
231 if (dp83640->clock->page != page) {
232 broadcast_write(phydev, PAGESEL, page);
233 dp83640->clock->page = page;
234 }
235 val = phy_read(phydev, regnum);
236
237 return val;
238 }
239
240 /* Caller must hold extreg_lock. */
241 static void ext_write(int broadcast, struct phy_device *phydev,
242 int page, u32 regnum, u16 val)
243 {
244 struct dp83640_private *dp83640 = phydev->priv;
245
246 if (dp83640->clock->page != page) {
247 broadcast_write(phydev, PAGESEL, page);
248 dp83640->clock->page = page;
249 }
250 if (broadcast)
251 broadcast_write(phydev, regnum, val);
252 else
253 phy_write(phydev, regnum, val);
254 }
255
256 /* Caller must hold extreg_lock. */
257 static int tdr_write(int bc, struct phy_device *dev,
258 const struct timespec64 *ts, u16 cmd)
259 {
260 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec & 0xffff);/* ns[15:0] */
261 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec >> 16); /* ns[31:16] */
262 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec & 0xffff); /* sec[15:0] */
263 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec >> 16); /* sec[31:16]*/
264
265 ext_write(bc, dev, PAGE4, PTP_CTL, cmd);
266
267 return 0;
268 }
269
270 /* convert phy timestamps into driver timestamps */
271
272 static void phy2rxts(struct phy_rxts *p, struct rxts *rxts)
273 {
274 u32 sec;
275
276 sec = p->sec_lo;
277 sec |= p->sec_hi << 16;
278
279 rxts->ns = p->ns_lo;
280 rxts->ns |= (p->ns_hi & 0x3fff) << 16;
281 rxts->ns += ((u64)sec) * 1000000000ULL;
282 rxts->seqid = p->seqid;
283 rxts->msgtype = (p->msgtype >> 12) & 0xf;
284 rxts->hash = p->msgtype & 0x0fff;
285 rxts->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
286 }
287
288 static u64 phy2txts(struct phy_txts *p)
289 {
290 u64 ns;
291 u32 sec;
292
293 sec = p->sec_lo;
294 sec |= p->sec_hi << 16;
295
296 ns = p->ns_lo;
297 ns |= (p->ns_hi & 0x3fff) << 16;
298 ns += ((u64)sec) * 1000000000ULL;
299
300 return ns;
301 }
302
303 static int periodic_output(struct dp83640_clock *clock,
304 struct ptp_clock_request *clkreq, bool on,
305 int trigger)
306 {
307 struct dp83640_private *dp83640 = clock->chosen;
308 struct phy_device *phydev = dp83640->phydev;
309 u32 sec, nsec, pwidth;
310 u16 gpio, ptp_trig, val;
311
312 if (on) {
313 gpio = 1 + ptp_find_pin(clock->ptp_clock, PTP_PF_PEROUT,
314 trigger);
315 if (gpio < 1)
316 return -EINVAL;
317 } else {
318 gpio = 0;
319 }
320
321 ptp_trig = TRIG_WR |
322 (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT |
323 (gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT |
324 TRIG_PER |
325 TRIG_PULSE;
326
327 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
328
329 if (!on) {
330 val |= TRIG_DIS;
331 mutex_lock(&clock->extreg_lock);
332 ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig);
333 ext_write(0, phydev, PAGE4, PTP_CTL, val);
334 mutex_unlock(&clock->extreg_lock);
335 return 0;
336 }
337
338 sec = clkreq->perout.start.sec;
339 nsec = clkreq->perout.start.nsec;
340 pwidth = clkreq->perout.period.sec * 1000000000UL;
341 pwidth += clkreq->perout.period.nsec;
342 pwidth /= 2;
343
344 mutex_lock(&clock->extreg_lock);
345
346 ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig);
347
348 /*load trigger*/
349 val |= TRIG_LOAD;
350 ext_write(0, phydev, PAGE4, PTP_CTL, val);
351 ext_write(0, phydev, PAGE4, PTP_TDR, nsec & 0xffff); /* ns[15:0] */
352 ext_write(0, phydev, PAGE4, PTP_TDR, nsec >> 16); /* ns[31:16] */
353 ext_write(0, phydev, PAGE4, PTP_TDR, sec & 0xffff); /* sec[15:0] */
354 ext_write(0, phydev, PAGE4, PTP_TDR, sec >> 16); /* sec[31:16] */
355 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff); /* ns[15:0] */
356 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16); /* ns[31:16] */
357 /* Triggers 0 and 1 has programmable pulsewidth2 */
358 if (trigger < 2) {
359 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff);
360 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16);
361 }
362
363 /*enable trigger*/
364 val &= ~TRIG_LOAD;
365 val |= TRIG_EN;
366 ext_write(0, phydev, PAGE4, PTP_CTL, val);
367
368 mutex_unlock(&clock->extreg_lock);
369 return 0;
370 }
371
372 /* ptp clock methods */
373
374 static int ptp_dp83640_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
375 {
376 struct dp83640_clock *clock =
377 container_of(ptp, struct dp83640_clock, caps);
378 struct phy_device *phydev = clock->chosen->phydev;
379 u64 rate;
380 int neg_adj = 0;
381 u16 hi, lo;
382
383 if (scaled_ppm < 0) {
384 neg_adj = 1;
385 scaled_ppm = -scaled_ppm;
386 }
387 rate = scaled_ppm;
388 rate <<= 13;
389 rate = div_u64(rate, 15625);
390
391 hi = (rate >> 16) & PTP_RATE_HI_MASK;
392 if (neg_adj)
393 hi |= PTP_RATE_DIR;
394
395 lo = rate & 0xffff;
396
397 mutex_lock(&clock->extreg_lock);
398
399 ext_write(1, phydev, PAGE4, PTP_RATEH, hi);
400 ext_write(1, phydev, PAGE4, PTP_RATEL, lo);
401
402 mutex_unlock(&clock->extreg_lock);
403
404 return 0;
405 }
406
407 static int ptp_dp83640_adjtime(struct ptp_clock_info *ptp, s64 delta)
408 {
409 struct dp83640_clock *clock =
410 container_of(ptp, struct dp83640_clock, caps);
411 struct phy_device *phydev = clock->chosen->phydev;
412 struct timespec64 ts;
413 int err;
414
415 delta += ADJTIME_FIX;
416
417 ts = ns_to_timespec64(delta);
418
419 mutex_lock(&clock->extreg_lock);
420
421 err = tdr_write(1, phydev, &ts, PTP_STEP_CLK);
422
423 mutex_unlock(&clock->extreg_lock);
424
425 return err;
426 }
427
428 static int ptp_dp83640_gettime(struct ptp_clock_info *ptp,
429 struct timespec64 *ts)
430 {
431 struct dp83640_clock *clock =
432 container_of(ptp, struct dp83640_clock, caps);
433 struct phy_device *phydev = clock->chosen->phydev;
434 unsigned int val[4];
435
436 mutex_lock(&clock->extreg_lock);
437
438 ext_write(0, phydev, PAGE4, PTP_CTL, PTP_RD_CLK);
439
440 val[0] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[15:0] */
441 val[1] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[31:16] */
442 val[2] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[15:0] */
443 val[3] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[31:16] */
444
445 mutex_unlock(&clock->extreg_lock);
446
447 ts->tv_nsec = val[0] | (val[1] << 16);
448 ts->tv_sec = val[2] | (val[3] << 16);
449
450 return 0;
451 }
452
453 static int ptp_dp83640_settime(struct ptp_clock_info *ptp,
454 const struct timespec64 *ts)
455 {
456 struct dp83640_clock *clock =
457 container_of(ptp, struct dp83640_clock, caps);
458 struct phy_device *phydev = clock->chosen->phydev;
459 int err;
460
461 mutex_lock(&clock->extreg_lock);
462
463 err = tdr_write(1, phydev, ts, PTP_LOAD_CLK);
464
465 mutex_unlock(&clock->extreg_lock);
466
467 return err;
468 }
469
470 static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
471 struct ptp_clock_request *rq, int on)
472 {
473 struct dp83640_clock *clock =
474 container_of(ptp, struct dp83640_clock, caps);
475 struct phy_device *phydev = clock->chosen->phydev;
476 unsigned int index;
477 u16 evnt, event_num, gpio_num;
478
479 switch (rq->type) {
480 case PTP_CLK_REQ_EXTTS:
481 /* Reject requests with unsupported flags */
482 if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
483 PTP_RISING_EDGE |
484 PTP_FALLING_EDGE |
485 PTP_STRICT_FLAGS))
486 return -EOPNOTSUPP;
487
488 /* Reject requests to enable time stamping on both edges. */
489 if ((rq->extts.flags & PTP_STRICT_FLAGS) &&
490 (rq->extts.flags & PTP_ENABLE_FEATURE) &&
491 (rq->extts.flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES)
492 return -EOPNOTSUPP;
493
494 index = rq->extts.index;
495 if (index >= N_EXT_TS)
496 return -EINVAL;
497 event_num = EXT_EVENT + index;
498 evnt = EVNT_WR | (event_num & EVNT_SEL_MASK) << EVNT_SEL_SHIFT;
499 if (on) {
500 gpio_num = 1 + ptp_find_pin(clock->ptp_clock,
501 PTP_PF_EXTTS, index);
502 if (gpio_num < 1)
503 return -EINVAL;
504 evnt |= (gpio_num & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
505 if (rq->extts.flags & PTP_FALLING_EDGE)
506 evnt |= EVNT_FALL;
507 else
508 evnt |= EVNT_RISE;
509 }
510 mutex_lock(&clock->extreg_lock);
511 ext_write(0, phydev, PAGE5, PTP_EVNT, evnt);
512 mutex_unlock(&clock->extreg_lock);
513 return 0;
514
515 case PTP_CLK_REQ_PEROUT:
516 /* Reject requests with unsupported flags */
517 if (rq->perout.flags)
518 return -EOPNOTSUPP;
519 if (rq->perout.index >= N_PER_OUT)
520 return -EINVAL;
521 return periodic_output(clock, rq, on, rq->perout.index);
522
523 default:
524 break;
525 }
526
527 return -EOPNOTSUPP;
528 }
529
530 static int ptp_dp83640_verify(struct ptp_clock_info *ptp, unsigned int pin,
531 enum ptp_pin_function func, unsigned int chan)
532 {
533 struct dp83640_clock *clock =
534 container_of(ptp, struct dp83640_clock, caps);
535
536 if (clock->caps.pin_config[pin].func == PTP_PF_PHYSYNC &&
537 !list_empty(&clock->phylist))
538 return 1;
539
540 if (func == PTP_PF_PHYSYNC)
541 return 1;
542
543 return 0;
544 }
545
546 static u8 status_frame_dst[6] = { 0x01, 0x1B, 0x19, 0x00, 0x00, 0x00 };
547 static u8 status_frame_src[6] = { 0x08, 0x00, 0x17, 0x0B, 0x6B, 0x0F };
548
549 static void enable_status_frames(struct phy_device *phydev, bool on)
550 {
551 struct dp83640_private *dp83640 = phydev->priv;
552 struct dp83640_clock *clock = dp83640->clock;
553 u16 cfg0 = 0, ver;
554
555 if (on)
556 cfg0 = PSF_EVNT_EN | PSF_RXTS_EN | PSF_TXTS_EN | ENDIAN_FLAG;
557
558 ver = (PSF_PTPVER & VERSIONPTP_MASK) << VERSIONPTP_SHIFT;
559
560 mutex_lock(&clock->extreg_lock);
561
562 ext_write(0, phydev, PAGE5, PSF_CFG0, cfg0);
563 ext_write(0, phydev, PAGE6, PSF_CFG1, ver);
564
565 mutex_unlock(&clock->extreg_lock);
566
567 if (!phydev->attached_dev) {
568 phydev_warn(phydev,
569 "expected to find an attached netdevice\n");
570 return;
571 }
572
573 if (on) {
574 if (dev_mc_add(phydev->attached_dev, status_frame_dst))
575 phydev_warn(phydev, "failed to add mc address\n");
576 } else {
577 if (dev_mc_del(phydev->attached_dev, status_frame_dst))
578 phydev_warn(phydev, "failed to delete mc address\n");
579 }
580 }
581
582 static bool is_status_frame(struct sk_buff *skb, int type)
583 {
584 struct ethhdr *h = eth_hdr(skb);
585
586 if (PTP_CLASS_V2_L2 == type &&
587 !memcmp(h->h_source, status_frame_src, sizeof(status_frame_src)))
588 return true;
589 else
590 return false;
591 }
592
593 static int expired(struct rxts *rxts)
594 {
595 return time_after(jiffies, rxts->tmo);
596 }
597
598 /* Caller must hold rx_lock. */
599 static void prune_rx_ts(struct dp83640_private *dp83640)
600 {
601 struct list_head *this, *next;
602 struct rxts *rxts;
603
604 list_for_each_safe(this, next, &dp83640->rxts) {
605 rxts = list_entry(this, struct rxts, list);
606 if (expired(rxts)) {
607 list_del_init(&rxts->list);
608 list_add(&rxts->list, &dp83640->rxpool);
609 }
610 }
611 }
612
613 /* synchronize the phyters so they act as one clock */
614
615 static void enable_broadcast(struct phy_device *phydev, int init_page, int on)
616 {
617 int val;
618 phy_write(phydev, PAGESEL, 0);
619 val = phy_read(phydev, PHYCR2);
620 if (on)
621 val |= BC_WRITE;
622 else
623 val &= ~BC_WRITE;
624 phy_write(phydev, PHYCR2, val);
625 phy_write(phydev, PAGESEL, init_page);
626 }
627
628 static void recalibrate(struct dp83640_clock *clock)
629 {
630 s64 now, diff;
631 struct phy_txts event_ts;
632 struct timespec64 ts;
633 struct list_head *this;
634 struct dp83640_private *tmp;
635 struct phy_device *master = clock->chosen->phydev;
636 u16 cal_gpio, cfg0, evnt, ptp_trig, trigger, val;
637
638 trigger = CAL_TRIGGER;
639 cal_gpio = 1 + ptp_find_pin_unlocked(clock->ptp_clock, PTP_PF_PHYSYNC, 0);
640 if (cal_gpio < 1) {
641 pr_err("PHY calibration pin not available - PHY is not calibrated.");
642 return;
643 }
644
645 mutex_lock(&clock->extreg_lock);
646
647 /*
648 * enable broadcast, disable status frames, enable ptp clock
649 */
650 list_for_each(this, &clock->phylist) {
651 tmp = list_entry(this, struct dp83640_private, list);
652 enable_broadcast(tmp->phydev, clock->page, 1);
653 tmp->cfg0 = ext_read(tmp->phydev, PAGE5, PSF_CFG0);
654 ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, 0);
655 ext_write(0, tmp->phydev, PAGE4, PTP_CTL, PTP_ENABLE);
656 }
657 enable_broadcast(master, clock->page, 1);
658 cfg0 = ext_read(master, PAGE5, PSF_CFG0);
659 ext_write(0, master, PAGE5, PSF_CFG0, 0);
660 ext_write(0, master, PAGE4, PTP_CTL, PTP_ENABLE);
661
662 /*
663 * enable an event timestamp
664 */
665 evnt = EVNT_WR | EVNT_RISE | EVNT_SINGLE;
666 evnt |= (CAL_EVENT & EVNT_SEL_MASK) << EVNT_SEL_SHIFT;
667 evnt |= (cal_gpio & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
668
669 list_for_each(this, &clock->phylist) {
670 tmp = list_entry(this, struct dp83640_private, list);
671 ext_write(0, tmp->phydev, PAGE5, PTP_EVNT, evnt);
672 }
673 ext_write(0, master, PAGE5, PTP_EVNT, evnt);
674
675 /*
676 * configure a trigger
677 */
678 ptp_trig = TRIG_WR | TRIG_IF_LATE | TRIG_PULSE;
679 ptp_trig |= (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT;
680 ptp_trig |= (cal_gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT;
681 ext_write(0, master, PAGE5, PTP_TRIG, ptp_trig);
682
683 /* load trigger */
684 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
685 val |= TRIG_LOAD;
686 ext_write(0, master, PAGE4, PTP_CTL, val);
687
688 /* enable trigger */
689 val &= ~TRIG_LOAD;
690 val |= TRIG_EN;
691 ext_write(0, master, PAGE4, PTP_CTL, val);
692
693 /* disable trigger */
694 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
695 val |= TRIG_DIS;
696 ext_write(0, master, PAGE4, PTP_CTL, val);
697
698 /*
699 * read out and correct offsets
700 */
701 val = ext_read(master, PAGE4, PTP_STS);
702 phydev_info(master, "master PTP_STS 0x%04hx\n", val);
703 val = ext_read(master, PAGE4, PTP_ESTS);
704 phydev_info(master, "master PTP_ESTS 0x%04hx\n", val);
705 event_ts.ns_lo = ext_read(master, PAGE4, PTP_EDATA);
706 event_ts.ns_hi = ext_read(master, PAGE4, PTP_EDATA);
707 event_ts.sec_lo = ext_read(master, PAGE4, PTP_EDATA);
708 event_ts.sec_hi = ext_read(master, PAGE4, PTP_EDATA);
709 now = phy2txts(&event_ts);
710
711 list_for_each(this, &clock->phylist) {
712 tmp = list_entry(this, struct dp83640_private, list);
713 val = ext_read(tmp->phydev, PAGE4, PTP_STS);
714 phydev_info(tmp->phydev, "slave PTP_STS 0x%04hx\n", val);
715 val = ext_read(tmp->phydev, PAGE4, PTP_ESTS);
716 phydev_info(tmp->phydev, "slave PTP_ESTS 0x%04hx\n", val);
717 event_ts.ns_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
718 event_ts.ns_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
719 event_ts.sec_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
720 event_ts.sec_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
721 diff = now - (s64) phy2txts(&event_ts);
722 phydev_info(tmp->phydev, "slave offset %lld nanoseconds\n",
723 diff);
724 diff += ADJTIME_FIX;
725 ts = ns_to_timespec64(diff);
726 tdr_write(0, tmp->phydev, &ts, PTP_STEP_CLK);
727 }
728
729 /*
730 * restore status frames
731 */
732 list_for_each(this, &clock->phylist) {
733 tmp = list_entry(this, struct dp83640_private, list);
734 ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, tmp->cfg0);
735 }
736 ext_write(0, master, PAGE5, PSF_CFG0, cfg0);
737
738 mutex_unlock(&clock->extreg_lock);
739 }
740
741 /* time stamping methods */
742
743 static inline u16 exts_chan_to_edata(int ch)
744 {
745 return 1 << ((ch + EXT_EVENT) * 2);
746 }
747
748 static int decode_evnt(struct dp83640_private *dp83640,
749 void *data, int len, u16 ests)
750 {
751 struct phy_txts *phy_txts;
752 struct ptp_clock_event event;
753 int i, parsed;
754 int words = (ests >> EVNT_TS_LEN_SHIFT) & EVNT_TS_LEN_MASK;
755 u16 ext_status = 0;
756
757 /* calculate length of the event timestamp status message */
758 if (ests & MULT_EVNT)
759 parsed = (words + 2) * sizeof(u16);
760 else
761 parsed = (words + 1) * sizeof(u16);
762
763 /* check if enough data is available */
764 if (len < parsed)
765 return len;
766
767 if (ests & MULT_EVNT) {
768 ext_status = *(u16 *) data;
769 data += sizeof(ext_status);
770 }
771
772 phy_txts = data;
773
774 switch (words) {
775 case 3:
776 dp83640->edata.sec_hi = phy_txts->sec_hi;
777 fallthrough;
778 case 2:
779 dp83640->edata.sec_lo = phy_txts->sec_lo;
780 fallthrough;
781 case 1:
782 dp83640->edata.ns_hi = phy_txts->ns_hi;
783 fallthrough;
784 case 0:
785 dp83640->edata.ns_lo = phy_txts->ns_lo;
786 }
787
788 if (!ext_status) {
789 i = ((ests >> EVNT_NUM_SHIFT) & EVNT_NUM_MASK) - EXT_EVENT;
790 ext_status = exts_chan_to_edata(i);
791 }
792
793 event.type = PTP_CLOCK_EXTTS;
794 event.timestamp = phy2txts(&dp83640->edata);
795
796 /* Compensate for input path and synchronization delays */
797 event.timestamp -= 35;
798
799 for (i = 0; i < N_EXT_TS; i++) {
800 if (ext_status & exts_chan_to_edata(i)) {
801 event.index = i;
802 ptp_clock_event(dp83640->clock->ptp_clock, &event);
803 }
804 }
805
806 return parsed;
807 }
808
809 #define DP83640_PACKET_HASH_LEN 10
810
811 static int match(struct sk_buff *skb, unsigned int type, struct rxts *rxts)
812 {
813 struct ptp_header *hdr;
814 u8 msgtype;
815 u16 seqid;
816 u16 hash;
817
818 /* check sequenceID, messageType, 12 bit hash of offset 20-29 */
819
820 hdr = ptp_parse_header(skb, type);
821 if (!hdr)
822 return 0;
823
824 msgtype = ptp_get_msgtype(hdr, type);
825
826 if (rxts->msgtype != (msgtype & 0xf))
827 return 0;
828
829 seqid = be16_to_cpu(hdr->sequence_id);
830 if (rxts->seqid != seqid)
831 return 0;
832
833 hash = ether_crc(DP83640_PACKET_HASH_LEN,
834 (unsigned char *)&hdr->source_port_identity) >> 20;
835 if (rxts->hash != hash)
836 return 0;
837
838 return 1;
839 }
840
841 static void decode_rxts(struct dp83640_private *dp83640,
842 struct phy_rxts *phy_rxts)
843 {
844 struct rxts *rxts;
845 struct skb_shared_hwtstamps *shhwtstamps = NULL;
846 struct sk_buff *skb;
847 unsigned long flags;
848 u8 overflow;
849
850 overflow = (phy_rxts->ns_hi >> 14) & 0x3;
851 if (overflow)
852 pr_debug("rx timestamp queue overflow, count %d\n", overflow);
853
854 spin_lock_irqsave(&dp83640->rx_lock, flags);
855
856 prune_rx_ts(dp83640);
857
858 if (list_empty(&dp83640->rxpool)) {
859 pr_debug("rx timestamp pool is empty\n");
860 goto out;
861 }
862 rxts = list_first_entry(&dp83640->rxpool, struct rxts, list);
863 list_del_init(&rxts->list);
864 phy2rxts(phy_rxts, rxts);
865
866 spin_lock(&dp83640->rx_queue.lock);
867 skb_queue_walk(&dp83640->rx_queue, skb) {
868 struct dp83640_skb_info *skb_info;
869
870 skb_info = (struct dp83640_skb_info *)skb->cb;
871 if (match(skb, skb_info->ptp_type, rxts)) {
872 __skb_unlink(skb, &dp83640->rx_queue);
873 shhwtstamps = skb_hwtstamps(skb);
874 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
875 shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns);
876 list_add(&rxts->list, &dp83640->rxpool);
877 break;
878 }
879 }
880 spin_unlock(&dp83640->rx_queue.lock);
881
882 if (!shhwtstamps)
883 list_add_tail(&rxts->list, &dp83640->rxts);
884 out:
885 spin_unlock_irqrestore(&dp83640->rx_lock, flags);
886
887 if (shhwtstamps)
888 netif_rx_ni(skb);
889 }
890
891 static void decode_txts(struct dp83640_private *dp83640,
892 struct phy_txts *phy_txts)
893 {
894 struct skb_shared_hwtstamps shhwtstamps;
895 struct dp83640_skb_info *skb_info;
896 struct sk_buff *skb;
897 u8 overflow;
898 u64 ns;
899
900 /* We must already have the skb that triggered this. */
901 again:
902 skb = skb_dequeue(&dp83640->tx_queue);
903 if (!skb) {
904 pr_debug("have timestamp but tx_queue empty\n");
905 return;
906 }
907
908 overflow = (phy_txts->ns_hi >> 14) & 0x3;
909 if (overflow) {
910 pr_debug("tx timestamp queue overflow, count %d\n", overflow);
911 while (skb) {
912 kfree_skb(skb);
913 skb = skb_dequeue(&dp83640->tx_queue);
914 }
915 return;
916 }
917 skb_info = (struct dp83640_skb_info *)skb->cb;
918 if (time_after(jiffies, skb_info->tmo)) {
919 kfree_skb(skb);
920 goto again;
921 }
922
923 ns = phy2txts(phy_txts);
924 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
925 shhwtstamps.hwtstamp = ns_to_ktime(ns);
926 skb_complete_tx_timestamp(skb, &shhwtstamps);
927 }
928
929 static void decode_status_frame(struct dp83640_private *dp83640,
930 struct sk_buff *skb)
931 {
932 struct phy_rxts *phy_rxts;
933 struct phy_txts *phy_txts;
934 u8 *ptr;
935 int len, size;
936 u16 ests, type;
937
938 ptr = skb->data + 2;
939
940 for (len = skb_headlen(skb) - 2; len > sizeof(type); len -= size) {
941
942 type = *(u16 *)ptr;
943 ests = type & 0x0fff;
944 type = type & 0xf000;
945 len -= sizeof(type);
946 ptr += sizeof(type);
947
948 if (PSF_RX == type && len >= sizeof(*phy_rxts)) {
949
950 phy_rxts = (struct phy_rxts *) ptr;
951 decode_rxts(dp83640, phy_rxts);
952 size = sizeof(*phy_rxts);
953
954 } else if (PSF_TX == type && len >= sizeof(*phy_txts)) {
955
956 phy_txts = (struct phy_txts *) ptr;
957 decode_txts(dp83640, phy_txts);
958 size = sizeof(*phy_txts);
959
960 } else if (PSF_EVNT == type) {
961
962 size = decode_evnt(dp83640, ptr, len, ests);
963
964 } else {
965 size = 0;
966 break;
967 }
968 ptr += size;
969 }
970 }
971
972 static int is_sync(struct sk_buff *skb, int type)
973 {
974 struct ptp_header *hdr;
975
976 hdr = ptp_parse_header(skb, type);
977 if (!hdr)
978 return 0;
979
980 return ptp_get_msgtype(hdr, type) == PTP_MSGTYPE_SYNC;
981 }
982
983 static void dp83640_free_clocks(void)
984 {
985 struct dp83640_clock *clock;
986 struct list_head *this, *next;
987
988 mutex_lock(&phyter_clocks_lock);
989
990 list_for_each_safe(this, next, &phyter_clocks) {
991 clock = list_entry(this, struct dp83640_clock, list);
992 if (!list_empty(&clock->phylist)) {
993 pr_warn("phy list non-empty while unloading\n");
994 BUG();
995 }
996 list_del(&clock->list);
997 mutex_destroy(&clock->extreg_lock);
998 mutex_destroy(&clock->clock_lock);
999 put_device(&clock->bus->dev);
1000 kfree(clock->caps.pin_config);
1001 kfree(clock);
1002 }
1003
1004 mutex_unlock(&phyter_clocks_lock);
1005 }
1006
1007 static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus)
1008 {
1009 INIT_LIST_HEAD(&clock->list);
1010 clock->bus = bus;
1011 mutex_init(&clock->extreg_lock);
1012 mutex_init(&clock->clock_lock);
1013 INIT_LIST_HEAD(&clock->phylist);
1014 clock->caps.owner = THIS_MODULE;
1015 sprintf(clock->caps.name, "dp83640 timer");
1016 clock->caps.max_adj = 1953124;
1017 clock->caps.n_alarm = 0;
1018 clock->caps.n_ext_ts = N_EXT_TS;
1019 clock->caps.n_per_out = N_PER_OUT;
1020 clock->caps.n_pins = DP83640_N_PINS;
1021 clock->caps.pps = 0;
1022 clock->caps.adjfine = ptp_dp83640_adjfine;
1023 clock->caps.adjtime = ptp_dp83640_adjtime;
1024 clock->caps.gettime64 = ptp_dp83640_gettime;
1025 clock->caps.settime64 = ptp_dp83640_settime;
1026 clock->caps.enable = ptp_dp83640_enable;
1027 clock->caps.verify = ptp_dp83640_verify;
1028 /*
1029 * Convert the module param defaults into a dynamic pin configuration.
1030 */
1031 dp83640_gpio_defaults(clock->caps.pin_config);
1032 /*
1033 * Get a reference to this bus instance.
1034 */
1035 get_device(&bus->dev);
1036 }
1037
1038 static int choose_this_phy(struct dp83640_clock *clock,
1039 struct phy_device *phydev)
1040 {
1041 if (chosen_phy == -1 && !clock->chosen)
1042 return 1;
1043
1044 if (chosen_phy == phydev->mdio.addr)
1045 return 1;
1046
1047 return 0;
1048 }
1049
1050 static struct dp83640_clock *dp83640_clock_get(struct dp83640_clock *clock)
1051 {
1052 if (clock)
1053 mutex_lock(&clock->clock_lock);
1054 return clock;
1055 }
1056
1057 /*
1058 * Look up and lock a clock by bus instance.
1059 * If there is no clock for this bus, then create it first.
1060 */
1061 static struct dp83640_clock *dp83640_clock_get_bus(struct mii_bus *bus)
1062 {
1063 struct dp83640_clock *clock = NULL, *tmp;
1064 struct list_head *this;
1065
1066 mutex_lock(&phyter_clocks_lock);
1067
1068 list_for_each(this, &phyter_clocks) {
1069 tmp = list_entry(this, struct dp83640_clock, list);
1070 if (tmp->bus == bus) {
1071 clock = tmp;
1072 break;
1073 }
1074 }
1075 if (clock)
1076 goto out;
1077
1078 clock = kzalloc(sizeof(struct dp83640_clock), GFP_KERNEL);
1079 if (!clock)
1080 goto out;
1081
1082 clock->caps.pin_config = kcalloc(DP83640_N_PINS,
1083 sizeof(struct ptp_pin_desc),
1084 GFP_KERNEL);
1085 if (!clock->caps.pin_config) {
1086 kfree(clock);
1087 clock = NULL;
1088 goto out;
1089 }
1090 dp83640_clock_init(clock, bus);
1091 list_add_tail(&clock->list, &phyter_clocks);
1092 out:
1093 mutex_unlock(&phyter_clocks_lock);
1094
1095 return dp83640_clock_get(clock);
1096 }
1097
1098 static void dp83640_clock_put(struct dp83640_clock *clock)
1099 {
1100 mutex_unlock(&clock->clock_lock);
1101 }
1102
1103 static int dp83640_soft_reset(struct phy_device *phydev)
1104 {
1105 int ret;
1106
1107 ret = genphy_soft_reset(phydev);
1108 if (ret < 0)
1109 return ret;
1110
1111 /* From DP83640 datasheet: "Software driver code must wait 3 us
1112 * following a software reset before allowing further serial MII
1113 * operations with the DP83640."
1114 */
1115 udelay(10); /* Taking udelay inaccuracy into account */
1116
1117 return 0;
1118 }
1119
1120 static int dp83640_config_init(struct phy_device *phydev)
1121 {
1122 struct dp83640_private *dp83640 = phydev->priv;
1123 struct dp83640_clock *clock = dp83640->clock;
1124
1125 if (clock->chosen && !list_empty(&clock->phylist))
1126 recalibrate(clock);
1127 else {
1128 mutex_lock(&clock->extreg_lock);
1129 enable_broadcast(phydev, clock->page, 1);
1130 mutex_unlock(&clock->extreg_lock);
1131 }
1132
1133 enable_status_frames(phydev, true);
1134
1135 mutex_lock(&clock->extreg_lock);
1136 ext_write(0, phydev, PAGE4, PTP_CTL, PTP_ENABLE);
1137 mutex_unlock(&clock->extreg_lock);
1138
1139 return 0;
1140 }
1141
1142 static int dp83640_ack_interrupt(struct phy_device *phydev)
1143 {
1144 int err = phy_read(phydev, MII_DP83640_MISR);
1145
1146 if (err < 0)
1147 return err;
1148
1149 return 0;
1150 }
1151
1152 static int dp83640_config_intr(struct phy_device *phydev)
1153 {
1154 int micr;
1155 int misr;
1156 int err;
1157
1158 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
1159 err = dp83640_ack_interrupt(phydev);
1160 if (err)
1161 return err;
1162
1163 misr = phy_read(phydev, MII_DP83640_MISR);
1164 if (misr < 0)
1165 return misr;
1166 misr |=
1167 (MII_DP83640_MISR_ANC_INT_EN |
1168 MII_DP83640_MISR_DUP_INT_EN |
1169 MII_DP83640_MISR_SPD_INT_EN |
1170 MII_DP83640_MISR_LINK_INT_EN);
1171 err = phy_write(phydev, MII_DP83640_MISR, misr);
1172 if (err < 0)
1173 return err;
1174
1175 micr = phy_read(phydev, MII_DP83640_MICR);
1176 if (micr < 0)
1177 return micr;
1178 micr |=
1179 (MII_DP83640_MICR_OE |
1180 MII_DP83640_MICR_IE);
1181 return phy_write(phydev, MII_DP83640_MICR, micr);
1182 } else {
1183 micr = phy_read(phydev, MII_DP83640_MICR);
1184 if (micr < 0)
1185 return micr;
1186 micr &=
1187 ~(MII_DP83640_MICR_OE |
1188 MII_DP83640_MICR_IE);
1189 err = phy_write(phydev, MII_DP83640_MICR, micr);
1190 if (err < 0)
1191 return err;
1192
1193 misr = phy_read(phydev, MII_DP83640_MISR);
1194 if (misr < 0)
1195 return misr;
1196 misr &=
1197 ~(MII_DP83640_MISR_ANC_INT_EN |
1198 MII_DP83640_MISR_DUP_INT_EN |
1199 MII_DP83640_MISR_SPD_INT_EN |
1200 MII_DP83640_MISR_LINK_INT_EN);
1201 err = phy_write(phydev, MII_DP83640_MISR, misr);
1202 if (err)
1203 return err;
1204
1205 return dp83640_ack_interrupt(phydev);
1206 }
1207 }
1208
1209 static irqreturn_t dp83640_handle_interrupt(struct phy_device *phydev)
1210 {
1211 int irq_status;
1212
1213 irq_status = phy_read(phydev, MII_DP83640_MISR);
1214 if (irq_status < 0) {
1215 phy_error(phydev);
1216 return IRQ_NONE;
1217 }
1218
1219 if (!(irq_status & MII_DP83640_MISR_INT_MASK))
1220 return IRQ_NONE;
1221
1222 phy_trigger_machine(phydev);
1223
1224 return IRQ_HANDLED;
1225 }
1226
1227 static int dp83640_hwtstamp(struct mii_timestamper *mii_ts, struct ifreq *ifr)
1228 {
1229 struct dp83640_private *dp83640 =
1230 container_of(mii_ts, struct dp83640_private, mii_ts);
1231 struct hwtstamp_config cfg;
1232 u16 txcfg0, rxcfg0;
1233
1234 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1235 return -EFAULT;
1236
1237 if (cfg.flags) /* reserved for future extensions */
1238 return -EINVAL;
1239
1240 if (cfg.tx_type < 0 || cfg.tx_type > HWTSTAMP_TX_ONESTEP_SYNC)
1241 return -ERANGE;
1242
1243 dp83640->hwts_tx_en = cfg.tx_type;
1244
1245 switch (cfg.rx_filter) {
1246 case HWTSTAMP_FILTER_NONE:
1247 dp83640->hwts_rx_en = 0;
1248 dp83640->layer = 0;
1249 dp83640->version = 0;
1250 break;
1251 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1252 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1253 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1254 dp83640->hwts_rx_en = 1;
1255 dp83640->layer = PTP_CLASS_L4;
1256 dp83640->version = PTP_CLASS_V1;
1257 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
1258 break;
1259 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1260 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1261 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1262 dp83640->hwts_rx_en = 1;
1263 dp83640->layer = PTP_CLASS_L4;
1264 dp83640->version = PTP_CLASS_V2;
1265 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
1266 break;
1267 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1268 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1269 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1270 dp83640->hwts_rx_en = 1;
1271 dp83640->layer = PTP_CLASS_L2;
1272 dp83640->version = PTP_CLASS_V2;
1273 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
1274 break;
1275 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1276 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1277 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1278 dp83640->hwts_rx_en = 1;
1279 dp83640->layer = PTP_CLASS_L4 | PTP_CLASS_L2;
1280 dp83640->version = PTP_CLASS_V2;
1281 cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
1282 break;
1283 default:
1284 return -ERANGE;
1285 }
1286
1287 txcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT;
1288 rxcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT;
1289
1290 if (dp83640->layer & PTP_CLASS_L2) {
1291 txcfg0 |= TX_L2_EN;
1292 rxcfg0 |= RX_L2_EN;
1293 }
1294 if (dp83640->layer & PTP_CLASS_L4) {
1295 txcfg0 |= TX_IPV6_EN | TX_IPV4_EN;
1296 rxcfg0 |= RX_IPV6_EN | RX_IPV4_EN;
1297 }
1298
1299 if (dp83640->hwts_tx_en)
1300 txcfg0 |= TX_TS_EN;
1301
1302 if (dp83640->hwts_tx_en == HWTSTAMP_TX_ONESTEP_SYNC)
1303 txcfg0 |= SYNC_1STEP | CHK_1STEP;
1304
1305 if (dp83640->hwts_rx_en)
1306 rxcfg0 |= RX_TS_EN;
1307
1308 mutex_lock(&dp83640->clock->extreg_lock);
1309
1310 ext_write(0, dp83640->phydev, PAGE5, PTP_TXCFG0, txcfg0);
1311 ext_write(0, dp83640->phydev, PAGE5, PTP_RXCFG0, rxcfg0);
1312
1313 mutex_unlock(&dp83640->clock->extreg_lock);
1314
1315 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1316 }
1317
1318 static void rx_timestamp_work(struct work_struct *work)
1319 {
1320 struct dp83640_private *dp83640 =
1321 container_of(work, struct dp83640_private, ts_work.work);
1322 struct sk_buff *skb;
1323
1324 /* Deliver expired packets. */
1325 while ((skb = skb_dequeue(&dp83640->rx_queue))) {
1326 struct dp83640_skb_info *skb_info;
1327
1328 skb_info = (struct dp83640_skb_info *)skb->cb;
1329 if (!time_after(jiffies, skb_info->tmo)) {
1330 skb_queue_head(&dp83640->rx_queue, skb);
1331 break;
1332 }
1333
1334 netif_rx_ni(skb);
1335 }
1336
1337 if (!skb_queue_empty(&dp83640->rx_queue))
1338 schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT);
1339 }
1340
1341 static bool dp83640_rxtstamp(struct mii_timestamper *mii_ts,
1342 struct sk_buff *skb, int type)
1343 {
1344 struct dp83640_private *dp83640 =
1345 container_of(mii_ts, struct dp83640_private, mii_ts);
1346 struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
1347 struct list_head *this, *next;
1348 struct rxts *rxts;
1349 struct skb_shared_hwtstamps *shhwtstamps = NULL;
1350 unsigned long flags;
1351
1352 if (is_status_frame(skb, type)) {
1353 decode_status_frame(dp83640, skb);
1354 kfree_skb(skb);
1355 return true;
1356 }
1357
1358 if (!dp83640->hwts_rx_en)
1359 return false;
1360
1361 if ((type & dp83640->version) == 0 || (type & dp83640->layer) == 0)
1362 return false;
1363
1364 spin_lock_irqsave(&dp83640->rx_lock, flags);
1365 prune_rx_ts(dp83640);
1366 list_for_each_safe(this, next, &dp83640->rxts) {
1367 rxts = list_entry(this, struct rxts, list);
1368 if (match(skb, type, rxts)) {
1369 shhwtstamps = skb_hwtstamps(skb);
1370 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
1371 shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns);
1372 list_del_init(&rxts->list);
1373 list_add(&rxts->list, &dp83640->rxpool);
1374 break;
1375 }
1376 }
1377 spin_unlock_irqrestore(&dp83640->rx_lock, flags);
1378
1379 if (!shhwtstamps) {
1380 skb_info->ptp_type = type;
1381 skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
1382 skb_queue_tail(&dp83640->rx_queue, skb);
1383 schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT);
1384 } else {
1385 netif_rx_ni(skb);
1386 }
1387
1388 return true;
1389 }
1390
1391 static void dp83640_txtstamp(struct mii_timestamper *mii_ts,
1392 struct sk_buff *skb, int type)
1393 {
1394 struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
1395 struct dp83640_private *dp83640 =
1396 container_of(mii_ts, struct dp83640_private, mii_ts);
1397
1398 switch (dp83640->hwts_tx_en) {
1399
1400 case HWTSTAMP_TX_ONESTEP_SYNC:
1401 if (is_sync(skb, type)) {
1402 kfree_skb(skb);
1403 return;
1404 }
1405 fallthrough;
1406 case HWTSTAMP_TX_ON:
1407 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1408 skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
1409 skb_queue_tail(&dp83640->tx_queue, skb);
1410 break;
1411
1412 case HWTSTAMP_TX_OFF:
1413 default:
1414 kfree_skb(skb);
1415 break;
1416 }
1417 }
1418
1419 static int dp83640_ts_info(struct mii_timestamper *mii_ts,
1420 struct ethtool_ts_info *info)
1421 {
1422 struct dp83640_private *dp83640 =
1423 container_of(mii_ts, struct dp83640_private, mii_ts);
1424
1425 info->so_timestamping =
1426 SOF_TIMESTAMPING_TX_HARDWARE |
1427 SOF_TIMESTAMPING_RX_HARDWARE |
1428 SOF_TIMESTAMPING_RAW_HARDWARE;
1429 info->phc_index = ptp_clock_index(dp83640->clock->ptp_clock);
1430 info->tx_types =
1431 (1 << HWTSTAMP_TX_OFF) |
1432 (1 << HWTSTAMP_TX_ON) |
1433 (1 << HWTSTAMP_TX_ONESTEP_SYNC);
1434 info->rx_filters =
1435 (1 << HWTSTAMP_FILTER_NONE) |
1436 (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
1437 (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
1438 (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
1439 (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
1440 return 0;
1441 }
1442
1443 static int dp83640_probe(struct phy_device *phydev)
1444 {
1445 struct dp83640_clock *clock;
1446 struct dp83640_private *dp83640;
1447 int err = -ENOMEM, i;
1448
1449 if (phydev->mdio.addr == BROADCAST_ADDR)
1450 return 0;
1451
1452 clock = dp83640_clock_get_bus(phydev->mdio.bus);
1453 if (!clock)
1454 goto no_clock;
1455
1456 dp83640 = kzalloc(sizeof(struct dp83640_private), GFP_KERNEL);
1457 if (!dp83640)
1458 goto no_memory;
1459
1460 dp83640->phydev = phydev;
1461 dp83640->mii_ts.rxtstamp = dp83640_rxtstamp;
1462 dp83640->mii_ts.txtstamp = dp83640_txtstamp;
1463 dp83640->mii_ts.hwtstamp = dp83640_hwtstamp;
1464 dp83640->mii_ts.ts_info = dp83640_ts_info;
1465
1466 INIT_DELAYED_WORK(&dp83640->ts_work, rx_timestamp_work);
1467 INIT_LIST_HEAD(&dp83640->rxts);
1468 INIT_LIST_HEAD(&dp83640->rxpool);
1469 for (i = 0; i < MAX_RXTS; i++)
1470 list_add(&dp83640->rx_pool_data[i].list, &dp83640->rxpool);
1471
1472 phydev->mii_ts = &dp83640->mii_ts;
1473 phydev->priv = dp83640;
1474
1475 spin_lock_init(&dp83640->rx_lock);
1476 skb_queue_head_init(&dp83640->rx_queue);
1477 skb_queue_head_init(&dp83640->tx_queue);
1478
1479 dp83640->clock = clock;
1480
1481 if (choose_this_phy(clock, phydev)) {
1482 clock->chosen = dp83640;
1483 clock->ptp_clock = ptp_clock_register(&clock->caps,
1484 &phydev->mdio.dev);
1485 if (IS_ERR(clock->ptp_clock)) {
1486 err = PTR_ERR(clock->ptp_clock);
1487 goto no_register;
1488 }
1489 } else
1490 list_add_tail(&dp83640->list, &clock->phylist);
1491
1492 dp83640_clock_put(clock);
1493 return 0;
1494
1495 no_register:
1496 clock->chosen = NULL;
1497 kfree(dp83640);
1498 no_memory:
1499 dp83640_clock_put(clock);
1500 no_clock:
1501 return err;
1502 }
1503
1504 static void dp83640_remove(struct phy_device *phydev)
1505 {
1506 struct dp83640_clock *clock;
1507 struct list_head *this, *next;
1508 struct dp83640_private *tmp, *dp83640 = phydev->priv;
1509
1510 if (phydev->mdio.addr == BROADCAST_ADDR)
1511 return;
1512
1513 phydev->mii_ts = NULL;
1514
1515 enable_status_frames(phydev, false);
1516 cancel_delayed_work_sync(&dp83640->ts_work);
1517
1518 skb_queue_purge(&dp83640->rx_queue);
1519 skb_queue_purge(&dp83640->tx_queue);
1520
1521 clock = dp83640_clock_get(dp83640->clock);
1522
1523 if (dp83640 == clock->chosen) {
1524 ptp_clock_unregister(clock->ptp_clock);
1525 clock->chosen = NULL;
1526 } else {
1527 list_for_each_safe(this, next, &clock->phylist) {
1528 tmp = list_entry(this, struct dp83640_private, list);
1529 if (tmp == dp83640) {
1530 list_del_init(&tmp->list);
1531 break;
1532 }
1533 }
1534 }
1535
1536 dp83640_clock_put(clock);
1537 kfree(dp83640);
1538 }
1539
1540 static struct phy_driver dp83640_driver = {
1541 .phy_id = DP83640_PHY_ID,
1542 .phy_id_mask = 0xfffffff0,
1543 .name = "NatSemi DP83640",
1544 /* PHY_BASIC_FEATURES */
1545 .probe = dp83640_probe,
1546 .remove = dp83640_remove,
1547 .soft_reset = dp83640_soft_reset,
1548 .config_init = dp83640_config_init,
1549 .config_intr = dp83640_config_intr,
1550 .handle_interrupt = dp83640_handle_interrupt,
1551 };
1552
1553 static int __init dp83640_init(void)
1554 {
1555 return phy_driver_register(&dp83640_driver, THIS_MODULE);
1556 }
1557
1558 static void __exit dp83640_exit(void)
1559 {
1560 dp83640_free_clocks();
1561 phy_driver_unregister(&dp83640_driver);
1562 }
1563
1564 MODULE_DESCRIPTION("National Semiconductor DP83640 PHY driver");
1565 MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
1566 MODULE_LICENSE("GPL");
1567
1568 module_init(dp83640_init);
1569 module_exit(dp83640_exit);
1570
1571 static struct mdio_device_id __maybe_unused dp83640_tbl[] = {
1572 { DP83640_PHY_ID, 0xfffffff0 },
1573 { }
1574 };
1575
1576 MODULE_DEVICE_TABLE(mdio, dp83640_tbl);
Linux with added FPC-III support