Loading...
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
73struct dp83640_skb_info {
74 int ptp_type;
75 unsigned long tmo;
76};
77
78struct 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
87struct 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
94struct rxts {
95 struct list_head list;
96 unsigned long tmo;
97 u64 ns;
98 u16 seqid;
99 u8 msgtype;
100 u16 hash;
101};
102
103struct dp83640_clock;
104
105struct 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
130struct 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
153enum {
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
165static int chosen_phy = -1;
166static ushort gpio_tab[GPIO_TABLE_SIZE] = {
167 1, 2, 3, 4, 8, 9, 10, 11
168};
169
170module_param(chosen_phy, int, 0444);
171module_param_array(gpio_tab, ushort, NULL, 0444);
172
173MODULE_PARM_DESC(chosen_phy,
174 "The address of the PHY to use for the ancillary clock features");
175MODULE_PARM_DESC(gpio_tab,
176 "Which GPIO line to use for which purpose: cal,perout,extts1,...,extts6");
177
178static 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 */
210static LIST_HEAD(phyter_clocks);
211static DEFINE_MUTEX(phyter_clocks_lock);
212
213static void rx_timestamp_work(struct work_struct *work);
214
215/* extended register access functions */
216
217#define BROADCAST_ADDR 31
218
219static 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. */
226static 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. */
241static 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. */
257static 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
272static 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
288static 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
303static 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
374static 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
407static 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
428static 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
453static 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
470static 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
530static 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
546static u8 status_frame_dst[6] = { 0x01, 0x1B, 0x19, 0x00, 0x00, 0x00 };
547static u8 status_frame_src[6] = { 0x08, 0x00, 0x17, 0x0B, 0x6B, 0x0F };
548
549static 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
582static 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
593static int expired(struct rxts *rxts)
594{
595 return time_after(jiffies, rxts->tmo);
596}
597
598/* Caller must hold rx_lock. */
599static 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
615static void enable_broadcast(struct phy_device *phydev, int init_page, int on)
616{
617 int val;
618
619 phy_write(phydev, PAGESEL, 0);
620 val = phy_read(phydev, PHYCR2);
621 if (on)
622 val |= BC_WRITE;
623 else
624 val &= ~BC_WRITE;
625 phy_write(phydev, PHYCR2, val);
626 phy_write(phydev, PAGESEL, init_page);
627}
628
629static void recalibrate(struct dp83640_clock *clock)
630{
631 s64 now, diff;
632 struct phy_txts event_ts;
633 struct timespec64 ts;
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_entry(tmp, &clock->phylist, list) {
651 enable_broadcast(tmp->phydev, clock->page, 1);
652 tmp->cfg0 = ext_read(tmp->phydev, PAGE5, PSF_CFG0);
653 ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, 0);
654 ext_write(0, tmp->phydev, PAGE4, PTP_CTL, PTP_ENABLE);
655 }
656 enable_broadcast(master, clock->page, 1);
657 cfg0 = ext_read(master, PAGE5, PSF_CFG0);
658 ext_write(0, master, PAGE5, PSF_CFG0, 0);
659 ext_write(0, master, PAGE4, PTP_CTL, PTP_ENABLE);
660
661 /*
662 * enable an event timestamp
663 */
664 evnt = EVNT_WR | EVNT_RISE | EVNT_SINGLE;
665 evnt |= (CAL_EVENT & EVNT_SEL_MASK) << EVNT_SEL_SHIFT;
666 evnt |= (cal_gpio & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
667
668 list_for_each_entry(tmp, &clock->phylist, list)
669 ext_write(0, tmp->phydev, PAGE5, PTP_EVNT, evnt);
670 ext_write(0, master, PAGE5, PTP_EVNT, evnt);
671
672 /*
673 * configure a trigger
674 */
675 ptp_trig = TRIG_WR | TRIG_IF_LATE | TRIG_PULSE;
676 ptp_trig |= (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT;
677 ptp_trig |= (cal_gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT;
678 ext_write(0, master, PAGE5, PTP_TRIG, ptp_trig);
679
680 /* load trigger */
681 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
682 val |= TRIG_LOAD;
683 ext_write(0, master, PAGE4, PTP_CTL, val);
684
685 /* enable trigger */
686 val &= ~TRIG_LOAD;
687 val |= TRIG_EN;
688 ext_write(0, master, PAGE4, PTP_CTL, val);
689
690 /* disable trigger */
691 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
692 val |= TRIG_DIS;
693 ext_write(0, master, PAGE4, PTP_CTL, val);
694
695 /*
696 * read out and correct offsets
697 */
698 val = ext_read(master, PAGE4, PTP_STS);
699 phydev_info(master, "master PTP_STS 0x%04hx\n", val);
700 val = ext_read(master, PAGE4, PTP_ESTS);
701 phydev_info(master, "master PTP_ESTS 0x%04hx\n", val);
702 event_ts.ns_lo = ext_read(master, PAGE4, PTP_EDATA);
703 event_ts.ns_hi = ext_read(master, PAGE4, PTP_EDATA);
704 event_ts.sec_lo = ext_read(master, PAGE4, PTP_EDATA);
705 event_ts.sec_hi = ext_read(master, PAGE4, PTP_EDATA);
706 now = phy2txts(&event_ts);
707
708 list_for_each_entry(tmp, &clock->phylist, list) {
709 val = ext_read(tmp->phydev, PAGE4, PTP_STS);
710 phydev_info(tmp->phydev, "slave PTP_STS 0x%04hx\n", val);
711 val = ext_read(tmp->phydev, PAGE4, PTP_ESTS);
712 phydev_info(tmp->phydev, "slave PTP_ESTS 0x%04hx\n", val);
713 event_ts.ns_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
714 event_ts.ns_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
715 event_ts.sec_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
716 event_ts.sec_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
717 diff = now - (s64) phy2txts(&event_ts);
718 phydev_info(tmp->phydev, "slave offset %lld nanoseconds\n",
719 diff);
720 diff += ADJTIME_FIX;
721 ts = ns_to_timespec64(diff);
722 tdr_write(0, tmp->phydev, &ts, PTP_STEP_CLK);
723 }
724
725 /*
726 * restore status frames
727 */
728 list_for_each_entry(tmp, &clock->phylist, list)
729 ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, tmp->cfg0);
730 ext_write(0, master, PAGE5, PSF_CFG0, cfg0);
731
732 mutex_unlock(&clock->extreg_lock);
733}
734
735/* time stamping methods */
736
737static inline u16 exts_chan_to_edata(int ch)
738{
739 return 1 << ((ch + EXT_EVENT) * 2);
740}
741
742static int decode_evnt(struct dp83640_private *dp83640,
743 void *data, int len, u16 ests)
744{
745 struct phy_txts *phy_txts;
746 struct ptp_clock_event event;
747 int i, parsed;
748 int words = (ests >> EVNT_TS_LEN_SHIFT) & EVNT_TS_LEN_MASK;
749 u16 ext_status = 0;
750
751 /* calculate length of the event timestamp status message */
752 if (ests & MULT_EVNT)
753 parsed = (words + 2) * sizeof(u16);
754 else
755 parsed = (words + 1) * sizeof(u16);
756
757 /* check if enough data is available */
758 if (len < parsed)
759 return len;
760
761 if (ests & MULT_EVNT) {
762 ext_status = *(u16 *) data;
763 data += sizeof(ext_status);
764 }
765
766 phy_txts = data;
767
768 switch (words) {
769 case 3:
770 dp83640->edata.sec_hi = phy_txts->sec_hi;
771 fallthrough;
772 case 2:
773 dp83640->edata.sec_lo = phy_txts->sec_lo;
774 fallthrough;
775 case 1:
776 dp83640->edata.ns_hi = phy_txts->ns_hi;
777 fallthrough;
778 case 0:
779 dp83640->edata.ns_lo = phy_txts->ns_lo;
780 }
781
782 if (!ext_status) {
783 i = ((ests >> EVNT_NUM_SHIFT) & EVNT_NUM_MASK) - EXT_EVENT;
784 ext_status = exts_chan_to_edata(i);
785 }
786
787 event.type = PTP_CLOCK_EXTTS;
788 event.timestamp = phy2txts(&dp83640->edata);
789
790 /* Compensate for input path and synchronization delays */
791 event.timestamp -= 35;
792
793 for (i = 0; i < N_EXT_TS; i++) {
794 if (ext_status & exts_chan_to_edata(i)) {
795 event.index = i;
796 ptp_clock_event(dp83640->clock->ptp_clock, &event);
797 }
798 }
799
800 return parsed;
801}
802
803#define DP83640_PACKET_HASH_LEN 10
804
805static int match(struct sk_buff *skb, unsigned int type, struct rxts *rxts)
806{
807 struct ptp_header *hdr;
808 u8 msgtype;
809 u16 seqid;
810 u16 hash;
811
812 /* check sequenceID, messageType, 12 bit hash of offset 20-29 */
813
814 hdr = ptp_parse_header(skb, type);
815 if (!hdr)
816 return 0;
817
818 msgtype = ptp_get_msgtype(hdr, type);
819
820 if (rxts->msgtype != (msgtype & 0xf))
821 return 0;
822
823 seqid = be16_to_cpu(hdr->sequence_id);
824 if (rxts->seqid != seqid)
825 return 0;
826
827 hash = ether_crc(DP83640_PACKET_HASH_LEN,
828 (unsigned char *)&hdr->source_port_identity) >> 20;
829 if (rxts->hash != hash)
830 return 0;
831
832 return 1;
833}
834
835static void decode_rxts(struct dp83640_private *dp83640,
836 struct phy_rxts *phy_rxts)
837{
838 struct rxts *rxts;
839 struct skb_shared_hwtstamps *shhwtstamps = NULL;
840 struct sk_buff *skb;
841 unsigned long flags;
842 u8 overflow;
843
844 overflow = (phy_rxts->ns_hi >> 14) & 0x3;
845 if (overflow)
846 pr_debug("rx timestamp queue overflow, count %d\n", overflow);
847
848 spin_lock_irqsave(&dp83640->rx_lock, flags);
849
850 prune_rx_ts(dp83640);
851
852 if (list_empty(&dp83640->rxpool)) {
853 pr_debug("rx timestamp pool is empty\n");
854 goto out;
855 }
856 rxts = list_first_entry(&dp83640->rxpool, struct rxts, list);
857 list_del_init(&rxts->list);
858 phy2rxts(phy_rxts, rxts);
859
860 spin_lock(&dp83640->rx_queue.lock);
861 skb_queue_walk(&dp83640->rx_queue, skb) {
862 struct dp83640_skb_info *skb_info;
863
864 skb_info = (struct dp83640_skb_info *)skb->cb;
865 if (match(skb, skb_info->ptp_type, rxts)) {
866 __skb_unlink(skb, &dp83640->rx_queue);
867 shhwtstamps = skb_hwtstamps(skb);
868 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
869 shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns);
870 list_add(&rxts->list, &dp83640->rxpool);
871 break;
872 }
873 }
874 spin_unlock(&dp83640->rx_queue.lock);
875
876 if (!shhwtstamps)
877 list_add_tail(&rxts->list, &dp83640->rxts);
878out:
879 spin_unlock_irqrestore(&dp83640->rx_lock, flags);
880
881 if (shhwtstamps)
882 netif_rx(skb);
883}
884
885static void decode_txts(struct dp83640_private *dp83640,
886 struct phy_txts *phy_txts)
887{
888 struct skb_shared_hwtstamps shhwtstamps;
889 struct dp83640_skb_info *skb_info;
890 struct sk_buff *skb;
891 u8 overflow;
892 u64 ns;
893
894 /* We must already have the skb that triggered this. */
895again:
896 skb = skb_dequeue(&dp83640->tx_queue);
897 if (!skb) {
898 pr_debug("have timestamp but tx_queue empty\n");
899 return;
900 }
901
902 overflow = (phy_txts->ns_hi >> 14) & 0x3;
903 if (overflow) {
904 pr_debug("tx timestamp queue overflow, count %d\n", overflow);
905 while (skb) {
906 kfree_skb(skb);
907 skb = skb_dequeue(&dp83640->tx_queue);
908 }
909 return;
910 }
911 skb_info = (struct dp83640_skb_info *)skb->cb;
912 if (time_after(jiffies, skb_info->tmo)) {
913 kfree_skb(skb);
914 goto again;
915 }
916
917 ns = phy2txts(phy_txts);
918 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
919 shhwtstamps.hwtstamp = ns_to_ktime(ns);
920 skb_complete_tx_timestamp(skb, &shhwtstamps);
921}
922
923static void decode_status_frame(struct dp83640_private *dp83640,
924 struct sk_buff *skb)
925{
926 struct phy_rxts *phy_rxts;
927 struct phy_txts *phy_txts;
928 u8 *ptr;
929 int len, size;
930 u16 ests, type;
931
932 ptr = skb->data + 2;
933
934 for (len = skb_headlen(skb) - 2; len > sizeof(type); len -= size) {
935
936 type = *(u16 *)ptr;
937 ests = type & 0x0fff;
938 type = type & 0xf000;
939 len -= sizeof(type);
940 ptr += sizeof(type);
941
942 if (PSF_RX == type && len >= sizeof(*phy_rxts)) {
943
944 phy_rxts = (struct phy_rxts *) ptr;
945 decode_rxts(dp83640, phy_rxts);
946 size = sizeof(*phy_rxts);
947
948 } else if (PSF_TX == type && len >= sizeof(*phy_txts)) {
949
950 phy_txts = (struct phy_txts *) ptr;
951 decode_txts(dp83640, phy_txts);
952 size = sizeof(*phy_txts);
953
954 } else if (PSF_EVNT == type) {
955
956 size = decode_evnt(dp83640, ptr, len, ests);
957
958 } else {
959 size = 0;
960 break;
961 }
962 ptr += size;
963 }
964}
965
966static void dp83640_free_clocks(void)
967{
968 struct dp83640_clock *clock;
969 struct list_head *this, *next;
970
971 mutex_lock(&phyter_clocks_lock);
972
973 list_for_each_safe(this, next, &phyter_clocks) {
974 clock = list_entry(this, struct dp83640_clock, list);
975 if (!list_empty(&clock->phylist)) {
976 pr_warn("phy list non-empty while unloading\n");
977 BUG();
978 }
979 list_del(&clock->list);
980 mutex_destroy(&clock->extreg_lock);
981 mutex_destroy(&clock->clock_lock);
982 put_device(&clock->bus->dev);
983 kfree(clock->caps.pin_config);
984 kfree(clock);
985 }
986
987 mutex_unlock(&phyter_clocks_lock);
988}
989
990static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus)
991{
992 INIT_LIST_HEAD(&clock->list);
993 clock->bus = bus;
994 mutex_init(&clock->extreg_lock);
995 mutex_init(&clock->clock_lock);
996 INIT_LIST_HEAD(&clock->phylist);
997 clock->caps.owner = THIS_MODULE;
998 sprintf(clock->caps.name, "dp83640 timer");
999 clock->caps.max_adj = 1953124;
1000 clock->caps.n_alarm = 0;
1001 clock->caps.n_ext_ts = N_EXT_TS;
1002 clock->caps.n_per_out = N_PER_OUT;
1003 clock->caps.n_pins = DP83640_N_PINS;
1004 clock->caps.pps = 0;
1005 clock->caps.adjfine = ptp_dp83640_adjfine;
1006 clock->caps.adjtime = ptp_dp83640_adjtime;
1007 clock->caps.gettime64 = ptp_dp83640_gettime;
1008 clock->caps.settime64 = ptp_dp83640_settime;
1009 clock->caps.enable = ptp_dp83640_enable;
1010 clock->caps.verify = ptp_dp83640_verify;
1011 /*
1012 * Convert the module param defaults into a dynamic pin configuration.
1013 */
1014 dp83640_gpio_defaults(clock->caps.pin_config);
1015 /*
1016 * Get a reference to this bus instance.
1017 */
1018 get_device(&bus->dev);
1019}
1020
1021static int choose_this_phy(struct dp83640_clock *clock,
1022 struct phy_device *phydev)
1023{
1024 if (chosen_phy == -1 && !clock->chosen)
1025 return 1;
1026
1027 if (chosen_phy == phydev->mdio.addr)
1028 return 1;
1029
1030 return 0;
1031}
1032
1033static struct dp83640_clock *dp83640_clock_get(struct dp83640_clock *clock)
1034{
1035 if (clock)
1036 mutex_lock(&clock->clock_lock);
1037 return clock;
1038}
1039
1040/*
1041 * Look up and lock a clock by bus instance.
1042 * If there is no clock for this bus, then create it first.
1043 */
1044static struct dp83640_clock *dp83640_clock_get_bus(struct mii_bus *bus)
1045{
1046 struct dp83640_clock *clock = NULL, *tmp;
1047 struct list_head *this;
1048
1049 mutex_lock(&phyter_clocks_lock);
1050
1051 list_for_each(this, &phyter_clocks) {
1052 tmp = list_entry(this, struct dp83640_clock, list);
1053 if (tmp->bus == bus) {
1054 clock = tmp;
1055 break;
1056 }
1057 }
1058 if (clock)
1059 goto out;
1060
1061 clock = kzalloc(sizeof(struct dp83640_clock), GFP_KERNEL);
1062 if (!clock)
1063 goto out;
1064
1065 clock->caps.pin_config = kcalloc(DP83640_N_PINS,
1066 sizeof(struct ptp_pin_desc),
1067 GFP_KERNEL);
1068 if (!clock->caps.pin_config) {
1069 kfree(clock);
1070 clock = NULL;
1071 goto out;
1072 }
1073 dp83640_clock_init(clock, bus);
1074 list_add_tail(&clock->list, &phyter_clocks);
1075out:
1076 mutex_unlock(&phyter_clocks_lock);
1077
1078 return dp83640_clock_get(clock);
1079}
1080
1081static void dp83640_clock_put(struct dp83640_clock *clock)
1082{
1083 mutex_unlock(&clock->clock_lock);
1084}
1085
1086static int dp83640_soft_reset(struct phy_device *phydev)
1087{
1088 int ret;
1089
1090 ret = genphy_soft_reset(phydev);
1091 if (ret < 0)
1092 return ret;
1093
1094 /* From DP83640 datasheet: "Software driver code must wait 3 us
1095 * following a software reset before allowing further serial MII
1096 * operations with the DP83640."
1097 */
1098 udelay(10); /* Taking udelay inaccuracy into account */
1099
1100 return 0;
1101}
1102
1103static int dp83640_config_init(struct phy_device *phydev)
1104{
1105 struct dp83640_private *dp83640 = phydev->priv;
1106 struct dp83640_clock *clock = dp83640->clock;
1107
1108 if (clock->chosen && !list_empty(&clock->phylist))
1109 recalibrate(clock);
1110 else {
1111 mutex_lock(&clock->extreg_lock);
1112 enable_broadcast(phydev, clock->page, 1);
1113 mutex_unlock(&clock->extreg_lock);
1114 }
1115
1116 enable_status_frames(phydev, true);
1117
1118 mutex_lock(&clock->extreg_lock);
1119 ext_write(0, phydev, PAGE4, PTP_CTL, PTP_ENABLE);
1120 mutex_unlock(&clock->extreg_lock);
1121
1122 return 0;
1123}
1124
1125static int dp83640_ack_interrupt(struct phy_device *phydev)
1126{
1127 int err = phy_read(phydev, MII_DP83640_MISR);
1128
1129 if (err < 0)
1130 return err;
1131
1132 return 0;
1133}
1134
1135static int dp83640_config_intr(struct phy_device *phydev)
1136{
1137 int micr;
1138 int misr;
1139 int err;
1140
1141 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
1142 err = dp83640_ack_interrupt(phydev);
1143 if (err)
1144 return err;
1145
1146 misr = phy_read(phydev, MII_DP83640_MISR);
1147 if (misr < 0)
1148 return misr;
1149 misr |=
1150 (MII_DP83640_MISR_ANC_INT_EN |
1151 MII_DP83640_MISR_DUP_INT_EN |
1152 MII_DP83640_MISR_SPD_INT_EN |
1153 MII_DP83640_MISR_LINK_INT_EN);
1154 err = phy_write(phydev, MII_DP83640_MISR, misr);
1155 if (err < 0)
1156 return err;
1157
1158 micr = phy_read(phydev, MII_DP83640_MICR);
1159 if (micr < 0)
1160 return micr;
1161 micr |=
1162 (MII_DP83640_MICR_OE |
1163 MII_DP83640_MICR_IE);
1164 return phy_write(phydev, MII_DP83640_MICR, micr);
1165 } else {
1166 micr = phy_read(phydev, MII_DP83640_MICR);
1167 if (micr < 0)
1168 return micr;
1169 micr &=
1170 ~(MII_DP83640_MICR_OE |
1171 MII_DP83640_MICR_IE);
1172 err = phy_write(phydev, MII_DP83640_MICR, micr);
1173 if (err < 0)
1174 return err;
1175
1176 misr = phy_read(phydev, MII_DP83640_MISR);
1177 if (misr < 0)
1178 return misr;
1179 misr &=
1180 ~(MII_DP83640_MISR_ANC_INT_EN |
1181 MII_DP83640_MISR_DUP_INT_EN |
1182 MII_DP83640_MISR_SPD_INT_EN |
1183 MII_DP83640_MISR_LINK_INT_EN);
1184 err = phy_write(phydev, MII_DP83640_MISR, misr);
1185 if (err)
1186 return err;
1187
1188 return dp83640_ack_interrupt(phydev);
1189 }
1190}
1191
1192static irqreturn_t dp83640_handle_interrupt(struct phy_device *phydev)
1193{
1194 int irq_status;
1195
1196 irq_status = phy_read(phydev, MII_DP83640_MISR);
1197 if (irq_status < 0) {
1198 phy_error(phydev);
1199 return IRQ_NONE;
1200 }
1201
1202 if (!(irq_status & MII_DP83640_MISR_INT_MASK))
1203 return IRQ_NONE;
1204
1205 phy_trigger_machine(phydev);
1206
1207 return IRQ_HANDLED;
1208}
1209
1210static int dp83640_hwtstamp(struct mii_timestamper *mii_ts,
1211 struct kernel_hwtstamp_config *cfg,
1212 struct netlink_ext_ack *extack)
1213{
1214 struct dp83640_private *dp83640 =
1215 container_of(mii_ts, struct dp83640_private, mii_ts);
1216 u16 txcfg0, rxcfg0;
1217
1218 if (cfg->tx_type < 0 || cfg->tx_type > HWTSTAMP_TX_ONESTEP_SYNC)
1219 return -ERANGE;
1220
1221 dp83640->hwts_tx_en = cfg->tx_type;
1222
1223 switch (cfg->rx_filter) {
1224 case HWTSTAMP_FILTER_NONE:
1225 dp83640->hwts_rx_en = 0;
1226 dp83640->layer = 0;
1227 dp83640->version = 0;
1228 break;
1229 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1230 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1231 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1232 dp83640->hwts_rx_en = 1;
1233 dp83640->layer = PTP_CLASS_L4;
1234 dp83640->version = PTP_CLASS_V1;
1235 cfg->rx_filter = HWTSTAMP_FILTER_PTP_V1_L4_EVENT;
1236 break;
1237 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1238 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1239 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1240 dp83640->hwts_rx_en = 1;
1241 dp83640->layer = PTP_CLASS_L4;
1242 dp83640->version = PTP_CLASS_V2;
1243 cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_L4_EVENT;
1244 break;
1245 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1246 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1247 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1248 dp83640->hwts_rx_en = 1;
1249 dp83640->layer = PTP_CLASS_L2;
1250 dp83640->version = PTP_CLASS_V2;
1251 cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
1252 break;
1253 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1254 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1255 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1256 dp83640->hwts_rx_en = 1;
1257 dp83640->layer = PTP_CLASS_L4 | PTP_CLASS_L2;
1258 dp83640->version = PTP_CLASS_V2;
1259 cfg->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
1260 break;
1261 default:
1262 return -ERANGE;
1263 }
1264
1265 txcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT;
1266 rxcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT;
1267
1268 if (dp83640->layer & PTP_CLASS_L2) {
1269 txcfg0 |= TX_L2_EN;
1270 rxcfg0 |= RX_L2_EN;
1271 }
1272 if (dp83640->layer & PTP_CLASS_L4) {
1273 txcfg0 |= TX_IPV6_EN | TX_IPV4_EN;
1274 rxcfg0 |= RX_IPV6_EN | RX_IPV4_EN;
1275 }
1276
1277 if (dp83640->hwts_tx_en)
1278 txcfg0 |= TX_TS_EN;
1279
1280 if (dp83640->hwts_tx_en == HWTSTAMP_TX_ONESTEP_SYNC)
1281 txcfg0 |= SYNC_1STEP | CHK_1STEP;
1282
1283 if (dp83640->hwts_rx_en)
1284 rxcfg0 |= RX_TS_EN;
1285
1286 mutex_lock(&dp83640->clock->extreg_lock);
1287
1288 ext_write(0, dp83640->phydev, PAGE5, PTP_TXCFG0, txcfg0);
1289 ext_write(0, dp83640->phydev, PAGE5, PTP_RXCFG0, rxcfg0);
1290
1291 mutex_unlock(&dp83640->clock->extreg_lock);
1292
1293 return 0;
1294}
1295
1296static void rx_timestamp_work(struct work_struct *work)
1297{
1298 struct dp83640_private *dp83640 =
1299 container_of(work, struct dp83640_private, ts_work.work);
1300 struct sk_buff *skb;
1301
1302 /* Deliver expired packets. */
1303 while ((skb = skb_dequeue(&dp83640->rx_queue))) {
1304 struct dp83640_skb_info *skb_info;
1305
1306 skb_info = (struct dp83640_skb_info *)skb->cb;
1307 if (!time_after(jiffies, skb_info->tmo)) {
1308 skb_queue_head(&dp83640->rx_queue, skb);
1309 break;
1310 }
1311
1312 netif_rx(skb);
1313 }
1314
1315 if (!skb_queue_empty(&dp83640->rx_queue))
1316 schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT);
1317}
1318
1319static bool dp83640_rxtstamp(struct mii_timestamper *mii_ts,
1320 struct sk_buff *skb, int type)
1321{
1322 struct dp83640_private *dp83640 =
1323 container_of(mii_ts, struct dp83640_private, mii_ts);
1324 struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
1325 struct list_head *this, *next;
1326 struct rxts *rxts;
1327 struct skb_shared_hwtstamps *shhwtstamps = NULL;
1328 unsigned long flags;
1329
1330 if (is_status_frame(skb, type)) {
1331 decode_status_frame(dp83640, skb);
1332 kfree_skb(skb);
1333 return true;
1334 }
1335
1336 if (!dp83640->hwts_rx_en)
1337 return false;
1338
1339 if ((type & dp83640->version) == 0 || (type & dp83640->layer) == 0)
1340 return false;
1341
1342 spin_lock_irqsave(&dp83640->rx_lock, flags);
1343 prune_rx_ts(dp83640);
1344 list_for_each_safe(this, next, &dp83640->rxts) {
1345 rxts = list_entry(this, struct rxts, list);
1346 if (match(skb, type, rxts)) {
1347 shhwtstamps = skb_hwtstamps(skb);
1348 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
1349 shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns);
1350 list_del_init(&rxts->list);
1351 list_add(&rxts->list, &dp83640->rxpool);
1352 break;
1353 }
1354 }
1355 spin_unlock_irqrestore(&dp83640->rx_lock, flags);
1356
1357 if (!shhwtstamps) {
1358 skb_info->ptp_type = type;
1359 skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
1360 skb_queue_tail(&dp83640->rx_queue, skb);
1361 schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT);
1362 } else {
1363 netif_rx(skb);
1364 }
1365
1366 return true;
1367}
1368
1369static void dp83640_txtstamp(struct mii_timestamper *mii_ts,
1370 struct sk_buff *skb, int type)
1371{
1372 struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
1373 struct dp83640_private *dp83640 =
1374 container_of(mii_ts, struct dp83640_private, mii_ts);
1375
1376 switch (dp83640->hwts_tx_en) {
1377
1378 case HWTSTAMP_TX_ONESTEP_SYNC:
1379 if (ptp_msg_is_sync(skb, type)) {
1380 kfree_skb(skb);
1381 return;
1382 }
1383 fallthrough;
1384 case HWTSTAMP_TX_ON:
1385 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1386 skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
1387 skb_queue_tail(&dp83640->tx_queue, skb);
1388 break;
1389
1390 case HWTSTAMP_TX_OFF:
1391 default:
1392 kfree_skb(skb);
1393 break;
1394 }
1395}
1396
1397static int dp83640_ts_info(struct mii_timestamper *mii_ts,
1398 struct kernel_ethtool_ts_info *info)
1399{
1400 struct dp83640_private *dp83640 =
1401 container_of(mii_ts, struct dp83640_private, mii_ts);
1402
1403 info->so_timestamping =
1404 SOF_TIMESTAMPING_TX_HARDWARE |
1405 SOF_TIMESTAMPING_RX_HARDWARE |
1406 SOF_TIMESTAMPING_RAW_HARDWARE;
1407 info->phc_index = ptp_clock_index(dp83640->clock->ptp_clock);
1408 info->tx_types =
1409 (1 << HWTSTAMP_TX_OFF) |
1410 (1 << HWTSTAMP_TX_ON) |
1411 (1 << HWTSTAMP_TX_ONESTEP_SYNC);
1412 info->rx_filters =
1413 (1 << HWTSTAMP_FILTER_NONE) |
1414 (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
1415 (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
1416 (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
1417 (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
1418 return 0;
1419}
1420
1421static int dp83640_probe(struct phy_device *phydev)
1422{
1423 struct dp83640_clock *clock;
1424 struct dp83640_private *dp83640;
1425 int err = -ENOMEM, i;
1426
1427 if (phydev->mdio.addr == BROADCAST_ADDR)
1428 return 0;
1429
1430 clock = dp83640_clock_get_bus(phydev->mdio.bus);
1431 if (!clock)
1432 goto no_clock;
1433
1434 dp83640 = kzalloc(sizeof(struct dp83640_private), GFP_KERNEL);
1435 if (!dp83640)
1436 goto no_memory;
1437
1438 dp83640->phydev = phydev;
1439 dp83640->mii_ts.rxtstamp = dp83640_rxtstamp;
1440 dp83640->mii_ts.txtstamp = dp83640_txtstamp;
1441 dp83640->mii_ts.hwtstamp = dp83640_hwtstamp;
1442 dp83640->mii_ts.ts_info = dp83640_ts_info;
1443
1444 INIT_DELAYED_WORK(&dp83640->ts_work, rx_timestamp_work);
1445 INIT_LIST_HEAD(&dp83640->rxts);
1446 INIT_LIST_HEAD(&dp83640->rxpool);
1447 for (i = 0; i < MAX_RXTS; i++)
1448 list_add(&dp83640->rx_pool_data[i].list, &dp83640->rxpool);
1449
1450 /* Timestamp selected by default to keep legacy API */
1451 phydev->default_timestamp = true;
1452 phydev->mii_ts = &dp83640->mii_ts;
1453 phydev->priv = dp83640;
1454
1455 spin_lock_init(&dp83640->rx_lock);
1456 skb_queue_head_init(&dp83640->rx_queue);
1457 skb_queue_head_init(&dp83640->tx_queue);
1458
1459 dp83640->clock = clock;
1460
1461 if (choose_this_phy(clock, phydev)) {
1462 clock->chosen = dp83640;
1463 clock->ptp_clock = ptp_clock_register(&clock->caps,
1464 &phydev->mdio.dev);
1465 if (IS_ERR(clock->ptp_clock)) {
1466 err = PTR_ERR(clock->ptp_clock);
1467 goto no_register;
1468 }
1469 } else
1470 list_add_tail(&dp83640->list, &clock->phylist);
1471
1472 dp83640_clock_put(clock);
1473 return 0;
1474
1475no_register:
1476 clock->chosen = NULL;
1477 kfree(dp83640);
1478no_memory:
1479 dp83640_clock_put(clock);
1480no_clock:
1481 return err;
1482}
1483
1484static void dp83640_remove(struct phy_device *phydev)
1485{
1486 struct dp83640_clock *clock;
1487 struct list_head *this, *next;
1488 struct dp83640_private *tmp, *dp83640 = phydev->priv;
1489
1490 if (phydev->mdio.addr == BROADCAST_ADDR)
1491 return;
1492
1493 phydev->mii_ts = NULL;
1494
1495 enable_status_frames(phydev, false);
1496 cancel_delayed_work_sync(&dp83640->ts_work);
1497
1498 skb_queue_purge(&dp83640->rx_queue);
1499 skb_queue_purge(&dp83640->tx_queue);
1500
1501 clock = dp83640_clock_get(dp83640->clock);
1502
1503 if (dp83640 == clock->chosen) {
1504 ptp_clock_unregister(clock->ptp_clock);
1505 clock->chosen = NULL;
1506 } else {
1507 list_for_each_safe(this, next, &clock->phylist) {
1508 tmp = list_entry(this, struct dp83640_private, list);
1509 if (tmp == dp83640) {
1510 list_del_init(&tmp->list);
1511 break;
1512 }
1513 }
1514 }
1515
1516 dp83640_clock_put(clock);
1517 kfree(dp83640);
1518}
1519
1520static struct phy_driver dp83640_driver = {
1521 .phy_id = DP83640_PHY_ID,
1522 .phy_id_mask = 0xfffffff0,
1523 .name = "NatSemi DP83640",
1524 /* PHY_BASIC_FEATURES */
1525 .probe = dp83640_probe,
1526 .remove = dp83640_remove,
1527 .soft_reset = dp83640_soft_reset,
1528 .config_init = dp83640_config_init,
1529 .config_intr = dp83640_config_intr,
1530 .handle_interrupt = dp83640_handle_interrupt,
1531};
1532
1533static int __init dp83640_init(void)
1534{
1535 return phy_driver_register(&dp83640_driver, THIS_MODULE);
1536}
1537
1538static void __exit dp83640_exit(void)
1539{
1540 dp83640_free_clocks();
1541 phy_driver_unregister(&dp83640_driver);
1542}
1543
1544MODULE_DESCRIPTION("National Semiconductor DP83640 PHY driver");
1545MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
1546MODULE_LICENSE("GPL");
1547
1548module_init(dp83640_init);
1549module_exit(dp83640_exit);
1550
1551static struct mdio_device_id __maybe_unused dp83640_tbl[] = {
1552 { DP83640_PHY_ID, 0xfffffff0 },
1553 { }
1554};
1555
1556MODULE_DEVICE_TABLE(mdio, dp83640_tbl);
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
54/* phyter seems to miss the mark by 16 ns */
55#define ADJTIME_FIX 16
56
57#define SKB_TIMESTAMP_TIMEOUT 2 /* jiffies */
58
59#if defined(__BIG_ENDIAN)
60#define ENDIAN_FLAG 0
61#elif defined(__LITTLE_ENDIAN)
62#define ENDIAN_FLAG PSF_ENDIAN
63#endif
64
65struct dp83640_skb_info {
66 int ptp_type;
67 unsigned long tmo;
68};
69
70struct phy_rxts {
71 u16 ns_lo; /* ns[15:0] */
72 u16 ns_hi; /* overflow[1:0], ns[29:16] */
73 u16 sec_lo; /* sec[15:0] */
74 u16 sec_hi; /* sec[31:16] */
75 u16 seqid; /* sequenceId[15:0] */
76 u16 msgtype; /* messageType[3:0], hash[11:0] */
77};
78
79struct phy_txts {
80 u16 ns_lo; /* ns[15:0] */
81 u16 ns_hi; /* overflow[1:0], ns[29:16] */
82 u16 sec_lo; /* sec[15:0] */
83 u16 sec_hi; /* sec[31:16] */
84};
85
86struct rxts {
87 struct list_head list;
88 unsigned long tmo;
89 u64 ns;
90 u16 seqid;
91 u8 msgtype;
92 u16 hash;
93};
94
95struct dp83640_clock;
96
97struct dp83640_private {
98 struct list_head list;
99 struct dp83640_clock *clock;
100 struct phy_device *phydev;
101 struct delayed_work ts_work;
102 int hwts_tx_en;
103 int hwts_rx_en;
104 int layer;
105 int version;
106 /* remember state of cfg0 during calibration */
107 int cfg0;
108 /* remember the last event time stamp */
109 struct phy_txts edata;
110 /* list of rx timestamps */
111 struct list_head rxts;
112 struct list_head rxpool;
113 struct rxts rx_pool_data[MAX_RXTS];
114 /* protects above three fields from concurrent access */
115 spinlock_t rx_lock;
116 /* queues of incoming and outgoing packets */
117 struct sk_buff_head rx_queue;
118 struct sk_buff_head tx_queue;
119};
120
121struct dp83640_clock {
122 /* keeps the instance in the 'phyter_clocks' list */
123 struct list_head list;
124 /* we create one clock instance per MII bus */
125 struct mii_bus *bus;
126 /* protects extended registers from concurrent access */
127 struct mutex extreg_lock;
128 /* remembers which page was last selected */
129 int page;
130 /* our advertised capabilities */
131 struct ptp_clock_info caps;
132 /* protects the three fields below from concurrent access */
133 struct mutex clock_lock;
134 /* the one phyter from which we shall read */
135 struct dp83640_private *chosen;
136 /* list of the other attached phyters, not chosen */
137 struct list_head phylist;
138 /* reference to our PTP hardware clock */
139 struct ptp_clock *ptp_clock;
140};
141
142/* globals */
143
144enum {
145 CALIBRATE_GPIO,
146 PEROUT_GPIO,
147 EXTTS0_GPIO,
148 EXTTS1_GPIO,
149 EXTTS2_GPIO,
150 EXTTS3_GPIO,
151 EXTTS4_GPIO,
152 EXTTS5_GPIO,
153 GPIO_TABLE_SIZE
154};
155
156static int chosen_phy = -1;
157static ushort gpio_tab[GPIO_TABLE_SIZE] = {
158 1, 2, 3, 4, 8, 9, 10, 11
159};
160
161module_param(chosen_phy, int, 0444);
162module_param_array(gpio_tab, ushort, NULL, 0444);
163
164MODULE_PARM_DESC(chosen_phy, \
165 "The address of the PHY to use for the ancillary clock features");
166MODULE_PARM_DESC(gpio_tab, \
167 "Which GPIO line to use for which purpose: cal,perout,extts1,...,extts6");
168
169static void dp83640_gpio_defaults(struct ptp_pin_desc *pd)
170{
171 int i, index;
172
173 for (i = 0; i < DP83640_N_PINS; i++) {
174 snprintf(pd[i].name, sizeof(pd[i].name), "GPIO%d", 1 + i);
175 pd[i].index = i;
176 }
177
178 for (i = 0; i < GPIO_TABLE_SIZE; i++) {
179 if (gpio_tab[i] < 1 || gpio_tab[i] > DP83640_N_PINS) {
180 pr_err("gpio_tab[%d]=%hu out of range", i, gpio_tab[i]);
181 return;
182 }
183 }
184
185 index = gpio_tab[CALIBRATE_GPIO] - 1;
186 pd[index].func = PTP_PF_PHYSYNC;
187 pd[index].chan = 0;
188
189 index = gpio_tab[PEROUT_GPIO] - 1;
190 pd[index].func = PTP_PF_PEROUT;
191 pd[index].chan = 0;
192
193 for (i = EXTTS0_GPIO; i < GPIO_TABLE_SIZE; i++) {
194 index = gpio_tab[i] - 1;
195 pd[index].func = PTP_PF_EXTTS;
196 pd[index].chan = i - EXTTS0_GPIO;
197 }
198}
199
200/* a list of clocks and a mutex to protect it */
201static LIST_HEAD(phyter_clocks);
202static DEFINE_MUTEX(phyter_clocks_lock);
203
204static void rx_timestamp_work(struct work_struct *work);
205
206/* extended register access functions */
207
208#define BROADCAST_ADDR 31
209
210static inline int broadcast_write(struct phy_device *phydev, u32 regnum,
211 u16 val)
212{
213 return mdiobus_write(phydev->mdio.bus, BROADCAST_ADDR, regnum, val);
214}
215
216/* Caller must hold extreg_lock. */
217static int ext_read(struct phy_device *phydev, int page, u32 regnum)
218{
219 struct dp83640_private *dp83640 = phydev->priv;
220 int val;
221
222 if (dp83640->clock->page != page) {
223 broadcast_write(phydev, PAGESEL, page);
224 dp83640->clock->page = page;
225 }
226 val = phy_read(phydev, regnum);
227
228 return val;
229}
230
231/* Caller must hold extreg_lock. */
232static void ext_write(int broadcast, struct phy_device *phydev,
233 int page, u32 regnum, u16 val)
234{
235 struct dp83640_private *dp83640 = phydev->priv;
236
237 if (dp83640->clock->page != page) {
238 broadcast_write(phydev, PAGESEL, page);
239 dp83640->clock->page = page;
240 }
241 if (broadcast)
242 broadcast_write(phydev, regnum, val);
243 else
244 phy_write(phydev, regnum, val);
245}
246
247/* Caller must hold extreg_lock. */
248static int tdr_write(int bc, struct phy_device *dev,
249 const struct timespec64 *ts, u16 cmd)
250{
251 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec & 0xffff);/* ns[15:0] */
252 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_nsec >> 16); /* ns[31:16] */
253 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec & 0xffff); /* sec[15:0] */
254 ext_write(bc, dev, PAGE4, PTP_TDR, ts->tv_sec >> 16); /* sec[31:16]*/
255
256 ext_write(bc, dev, PAGE4, PTP_CTL, cmd);
257
258 return 0;
259}
260
261/* convert phy timestamps into driver timestamps */
262
263static void phy2rxts(struct phy_rxts *p, struct rxts *rxts)
264{
265 u32 sec;
266
267 sec = p->sec_lo;
268 sec |= p->sec_hi << 16;
269
270 rxts->ns = p->ns_lo;
271 rxts->ns |= (p->ns_hi & 0x3fff) << 16;
272 rxts->ns += ((u64)sec) * 1000000000ULL;
273 rxts->seqid = p->seqid;
274 rxts->msgtype = (p->msgtype >> 12) & 0xf;
275 rxts->hash = p->msgtype & 0x0fff;
276 rxts->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
277}
278
279static u64 phy2txts(struct phy_txts *p)
280{
281 u64 ns;
282 u32 sec;
283
284 sec = p->sec_lo;
285 sec |= p->sec_hi << 16;
286
287 ns = p->ns_lo;
288 ns |= (p->ns_hi & 0x3fff) << 16;
289 ns += ((u64)sec) * 1000000000ULL;
290
291 return ns;
292}
293
294static int periodic_output(struct dp83640_clock *clock,
295 struct ptp_clock_request *clkreq, bool on,
296 int trigger)
297{
298 struct dp83640_private *dp83640 = clock->chosen;
299 struct phy_device *phydev = dp83640->phydev;
300 u32 sec, nsec, pwidth;
301 u16 gpio, ptp_trig, val;
302
303 if (on) {
304 gpio = 1 + ptp_find_pin(clock->ptp_clock, PTP_PF_PEROUT,
305 trigger);
306 if (gpio < 1)
307 return -EINVAL;
308 } else {
309 gpio = 0;
310 }
311
312 ptp_trig = TRIG_WR |
313 (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT |
314 (gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT |
315 TRIG_PER |
316 TRIG_PULSE;
317
318 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
319
320 if (!on) {
321 val |= TRIG_DIS;
322 mutex_lock(&clock->extreg_lock);
323 ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig);
324 ext_write(0, phydev, PAGE4, PTP_CTL, val);
325 mutex_unlock(&clock->extreg_lock);
326 return 0;
327 }
328
329 sec = clkreq->perout.start.sec;
330 nsec = clkreq->perout.start.nsec;
331 pwidth = clkreq->perout.period.sec * 1000000000UL;
332 pwidth += clkreq->perout.period.nsec;
333 pwidth /= 2;
334
335 mutex_lock(&clock->extreg_lock);
336
337 ext_write(0, phydev, PAGE5, PTP_TRIG, ptp_trig);
338
339 /*load trigger*/
340 val |= TRIG_LOAD;
341 ext_write(0, phydev, PAGE4, PTP_CTL, val);
342 ext_write(0, phydev, PAGE4, PTP_TDR, nsec & 0xffff); /* ns[15:0] */
343 ext_write(0, phydev, PAGE4, PTP_TDR, nsec >> 16); /* ns[31:16] */
344 ext_write(0, phydev, PAGE4, PTP_TDR, sec & 0xffff); /* sec[15:0] */
345 ext_write(0, phydev, PAGE4, PTP_TDR, sec >> 16); /* sec[31:16] */
346 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff); /* ns[15:0] */
347 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16); /* ns[31:16] */
348 /* Triggers 0 and 1 has programmable pulsewidth2 */
349 if (trigger < 2) {
350 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth & 0xffff);
351 ext_write(0, phydev, PAGE4, PTP_TDR, pwidth >> 16);
352 }
353
354 /*enable trigger*/
355 val &= ~TRIG_LOAD;
356 val |= TRIG_EN;
357 ext_write(0, phydev, PAGE4, PTP_CTL, val);
358
359 mutex_unlock(&clock->extreg_lock);
360 return 0;
361}
362
363/* ptp clock methods */
364
365static int ptp_dp83640_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
366{
367 struct dp83640_clock *clock =
368 container_of(ptp, struct dp83640_clock, caps);
369 struct phy_device *phydev = clock->chosen->phydev;
370 u64 rate;
371 int neg_adj = 0;
372 u16 hi, lo;
373
374 if (scaled_ppm < 0) {
375 neg_adj = 1;
376 scaled_ppm = -scaled_ppm;
377 }
378 rate = scaled_ppm;
379 rate <<= 13;
380 rate = div_u64(rate, 15625);
381
382 hi = (rate >> 16) & PTP_RATE_HI_MASK;
383 if (neg_adj)
384 hi |= PTP_RATE_DIR;
385
386 lo = rate & 0xffff;
387
388 mutex_lock(&clock->extreg_lock);
389
390 ext_write(1, phydev, PAGE4, PTP_RATEH, hi);
391 ext_write(1, phydev, PAGE4, PTP_RATEL, lo);
392
393 mutex_unlock(&clock->extreg_lock);
394
395 return 0;
396}
397
398static int ptp_dp83640_adjtime(struct ptp_clock_info *ptp, s64 delta)
399{
400 struct dp83640_clock *clock =
401 container_of(ptp, struct dp83640_clock, caps);
402 struct phy_device *phydev = clock->chosen->phydev;
403 struct timespec64 ts;
404 int err;
405
406 delta += ADJTIME_FIX;
407
408 ts = ns_to_timespec64(delta);
409
410 mutex_lock(&clock->extreg_lock);
411
412 err = tdr_write(1, phydev, &ts, PTP_STEP_CLK);
413
414 mutex_unlock(&clock->extreg_lock);
415
416 return err;
417}
418
419static int ptp_dp83640_gettime(struct ptp_clock_info *ptp,
420 struct timespec64 *ts)
421{
422 struct dp83640_clock *clock =
423 container_of(ptp, struct dp83640_clock, caps);
424 struct phy_device *phydev = clock->chosen->phydev;
425 unsigned int val[4];
426
427 mutex_lock(&clock->extreg_lock);
428
429 ext_write(0, phydev, PAGE4, PTP_CTL, PTP_RD_CLK);
430
431 val[0] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[15:0] */
432 val[1] = ext_read(phydev, PAGE4, PTP_TDR); /* ns[31:16] */
433 val[2] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[15:0] */
434 val[3] = ext_read(phydev, PAGE4, PTP_TDR); /* sec[31:16] */
435
436 mutex_unlock(&clock->extreg_lock);
437
438 ts->tv_nsec = val[0] | (val[1] << 16);
439 ts->tv_sec = val[2] | (val[3] << 16);
440
441 return 0;
442}
443
444static int ptp_dp83640_settime(struct ptp_clock_info *ptp,
445 const struct timespec64 *ts)
446{
447 struct dp83640_clock *clock =
448 container_of(ptp, struct dp83640_clock, caps);
449 struct phy_device *phydev = clock->chosen->phydev;
450 int err;
451
452 mutex_lock(&clock->extreg_lock);
453
454 err = tdr_write(1, phydev, ts, PTP_LOAD_CLK);
455
456 mutex_unlock(&clock->extreg_lock);
457
458 return err;
459}
460
461static int ptp_dp83640_enable(struct ptp_clock_info *ptp,
462 struct ptp_clock_request *rq, int on)
463{
464 struct dp83640_clock *clock =
465 container_of(ptp, struct dp83640_clock, caps);
466 struct phy_device *phydev = clock->chosen->phydev;
467 unsigned int index;
468 u16 evnt, event_num, gpio_num;
469
470 switch (rq->type) {
471 case PTP_CLK_REQ_EXTTS:
472 /* Reject requests with unsupported flags */
473 if (rq->extts.flags & ~(PTP_ENABLE_FEATURE |
474 PTP_RISING_EDGE |
475 PTP_FALLING_EDGE |
476 PTP_STRICT_FLAGS))
477 return -EOPNOTSUPP;
478
479 /* Reject requests to enable time stamping on both edges. */
480 if ((rq->extts.flags & PTP_STRICT_FLAGS) &&
481 (rq->extts.flags & PTP_ENABLE_FEATURE) &&
482 (rq->extts.flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES)
483 return -EOPNOTSUPP;
484
485 index = rq->extts.index;
486 if (index >= N_EXT_TS)
487 return -EINVAL;
488 event_num = EXT_EVENT + index;
489 evnt = EVNT_WR | (event_num & EVNT_SEL_MASK) << EVNT_SEL_SHIFT;
490 if (on) {
491 gpio_num = 1 + ptp_find_pin(clock->ptp_clock,
492 PTP_PF_EXTTS, index);
493 if (gpio_num < 1)
494 return -EINVAL;
495 evnt |= (gpio_num & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
496 if (rq->extts.flags & PTP_FALLING_EDGE)
497 evnt |= EVNT_FALL;
498 else
499 evnt |= EVNT_RISE;
500 }
501 mutex_lock(&clock->extreg_lock);
502 ext_write(0, phydev, PAGE5, PTP_EVNT, evnt);
503 mutex_unlock(&clock->extreg_lock);
504 return 0;
505
506 case PTP_CLK_REQ_PEROUT:
507 /* Reject requests with unsupported flags */
508 if (rq->perout.flags)
509 return -EOPNOTSUPP;
510 if (rq->perout.index >= N_PER_OUT)
511 return -EINVAL;
512 return periodic_output(clock, rq, on, rq->perout.index);
513
514 default:
515 break;
516 }
517
518 return -EOPNOTSUPP;
519}
520
521static int ptp_dp83640_verify(struct ptp_clock_info *ptp, unsigned int pin,
522 enum ptp_pin_function func, unsigned int chan)
523{
524 struct dp83640_clock *clock =
525 container_of(ptp, struct dp83640_clock, caps);
526
527 if (clock->caps.pin_config[pin].func == PTP_PF_PHYSYNC &&
528 !list_empty(&clock->phylist))
529 return 1;
530
531 if (func == PTP_PF_PHYSYNC)
532 return 1;
533
534 return 0;
535}
536
537static u8 status_frame_dst[6] = { 0x01, 0x1B, 0x19, 0x00, 0x00, 0x00 };
538static u8 status_frame_src[6] = { 0x08, 0x00, 0x17, 0x0B, 0x6B, 0x0F };
539
540static void enable_status_frames(struct phy_device *phydev, bool on)
541{
542 struct dp83640_private *dp83640 = phydev->priv;
543 struct dp83640_clock *clock = dp83640->clock;
544 u16 cfg0 = 0, ver;
545
546 if (on)
547 cfg0 = PSF_EVNT_EN | PSF_RXTS_EN | PSF_TXTS_EN | ENDIAN_FLAG;
548
549 ver = (PSF_PTPVER & VERSIONPTP_MASK) << VERSIONPTP_SHIFT;
550
551 mutex_lock(&clock->extreg_lock);
552
553 ext_write(0, phydev, PAGE5, PSF_CFG0, cfg0);
554 ext_write(0, phydev, PAGE6, PSF_CFG1, ver);
555
556 mutex_unlock(&clock->extreg_lock);
557
558 if (!phydev->attached_dev) {
559 phydev_warn(phydev,
560 "expected to find an attached netdevice\n");
561 return;
562 }
563
564 if (on) {
565 if (dev_mc_add(phydev->attached_dev, status_frame_dst))
566 phydev_warn(phydev, "failed to add mc address\n");
567 } else {
568 if (dev_mc_del(phydev->attached_dev, status_frame_dst))
569 phydev_warn(phydev, "failed to delete mc address\n");
570 }
571}
572
573static bool is_status_frame(struct sk_buff *skb, int type)
574{
575 struct ethhdr *h = eth_hdr(skb);
576
577 if (PTP_CLASS_V2_L2 == type &&
578 !memcmp(h->h_source, status_frame_src, sizeof(status_frame_src)))
579 return true;
580 else
581 return false;
582}
583
584static int expired(struct rxts *rxts)
585{
586 return time_after(jiffies, rxts->tmo);
587}
588
589/* Caller must hold rx_lock. */
590static void prune_rx_ts(struct dp83640_private *dp83640)
591{
592 struct list_head *this, *next;
593 struct rxts *rxts;
594
595 list_for_each_safe(this, next, &dp83640->rxts) {
596 rxts = list_entry(this, struct rxts, list);
597 if (expired(rxts)) {
598 list_del_init(&rxts->list);
599 list_add(&rxts->list, &dp83640->rxpool);
600 }
601 }
602}
603
604/* synchronize the phyters so they act as one clock */
605
606static void enable_broadcast(struct phy_device *phydev, int init_page, int on)
607{
608 int val;
609 phy_write(phydev, PAGESEL, 0);
610 val = phy_read(phydev, PHYCR2);
611 if (on)
612 val |= BC_WRITE;
613 else
614 val &= ~BC_WRITE;
615 phy_write(phydev, PHYCR2, val);
616 phy_write(phydev, PAGESEL, init_page);
617}
618
619static void recalibrate(struct dp83640_clock *clock)
620{
621 s64 now, diff;
622 struct phy_txts event_ts;
623 struct timespec64 ts;
624 struct list_head *this;
625 struct dp83640_private *tmp;
626 struct phy_device *master = clock->chosen->phydev;
627 u16 cal_gpio, cfg0, evnt, ptp_trig, trigger, val;
628
629 trigger = CAL_TRIGGER;
630 cal_gpio = 1 + ptp_find_pin(clock->ptp_clock, PTP_PF_PHYSYNC, 0);
631 if (cal_gpio < 1) {
632 pr_err("PHY calibration pin not available - PHY is not calibrated.");
633 return;
634 }
635
636 mutex_lock(&clock->extreg_lock);
637
638 /*
639 * enable broadcast, disable status frames, enable ptp clock
640 */
641 list_for_each(this, &clock->phylist) {
642 tmp = list_entry(this, struct dp83640_private, list);
643 enable_broadcast(tmp->phydev, clock->page, 1);
644 tmp->cfg0 = ext_read(tmp->phydev, PAGE5, PSF_CFG0);
645 ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, 0);
646 ext_write(0, tmp->phydev, PAGE4, PTP_CTL, PTP_ENABLE);
647 }
648 enable_broadcast(master, clock->page, 1);
649 cfg0 = ext_read(master, PAGE5, PSF_CFG0);
650 ext_write(0, master, PAGE5, PSF_CFG0, 0);
651 ext_write(0, master, PAGE4, PTP_CTL, PTP_ENABLE);
652
653 /*
654 * enable an event timestamp
655 */
656 evnt = EVNT_WR | EVNT_RISE | EVNT_SINGLE;
657 evnt |= (CAL_EVENT & EVNT_SEL_MASK) << EVNT_SEL_SHIFT;
658 evnt |= (cal_gpio & EVNT_GPIO_MASK) << EVNT_GPIO_SHIFT;
659
660 list_for_each(this, &clock->phylist) {
661 tmp = list_entry(this, struct dp83640_private, list);
662 ext_write(0, tmp->phydev, PAGE5, PTP_EVNT, evnt);
663 }
664 ext_write(0, master, PAGE5, PTP_EVNT, evnt);
665
666 /*
667 * configure a trigger
668 */
669 ptp_trig = TRIG_WR | TRIG_IF_LATE | TRIG_PULSE;
670 ptp_trig |= (trigger & TRIG_CSEL_MASK) << TRIG_CSEL_SHIFT;
671 ptp_trig |= (cal_gpio & TRIG_GPIO_MASK) << TRIG_GPIO_SHIFT;
672 ext_write(0, master, PAGE5, PTP_TRIG, ptp_trig);
673
674 /* load trigger */
675 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
676 val |= TRIG_LOAD;
677 ext_write(0, master, PAGE4, PTP_CTL, val);
678
679 /* enable trigger */
680 val &= ~TRIG_LOAD;
681 val |= TRIG_EN;
682 ext_write(0, master, PAGE4, PTP_CTL, val);
683
684 /* disable trigger */
685 val = (trigger & TRIG_SEL_MASK) << TRIG_SEL_SHIFT;
686 val |= TRIG_DIS;
687 ext_write(0, master, PAGE4, PTP_CTL, val);
688
689 /*
690 * read out and correct offsets
691 */
692 val = ext_read(master, PAGE4, PTP_STS);
693 phydev_info(master, "master PTP_STS 0x%04hx\n", val);
694 val = ext_read(master, PAGE4, PTP_ESTS);
695 phydev_info(master, "master PTP_ESTS 0x%04hx\n", val);
696 event_ts.ns_lo = ext_read(master, PAGE4, PTP_EDATA);
697 event_ts.ns_hi = ext_read(master, PAGE4, PTP_EDATA);
698 event_ts.sec_lo = ext_read(master, PAGE4, PTP_EDATA);
699 event_ts.sec_hi = ext_read(master, PAGE4, PTP_EDATA);
700 now = phy2txts(&event_ts);
701
702 list_for_each(this, &clock->phylist) {
703 tmp = list_entry(this, struct dp83640_private, list);
704 val = ext_read(tmp->phydev, PAGE4, PTP_STS);
705 phydev_info(tmp->phydev, "slave PTP_STS 0x%04hx\n", val);
706 val = ext_read(tmp->phydev, PAGE4, PTP_ESTS);
707 phydev_info(tmp->phydev, "slave PTP_ESTS 0x%04hx\n", val);
708 event_ts.ns_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
709 event_ts.ns_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
710 event_ts.sec_lo = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
711 event_ts.sec_hi = ext_read(tmp->phydev, PAGE4, PTP_EDATA);
712 diff = now - (s64) phy2txts(&event_ts);
713 phydev_info(tmp->phydev, "slave offset %lld nanoseconds\n",
714 diff);
715 diff += ADJTIME_FIX;
716 ts = ns_to_timespec64(diff);
717 tdr_write(0, tmp->phydev, &ts, PTP_STEP_CLK);
718 }
719
720 /*
721 * restore status frames
722 */
723 list_for_each(this, &clock->phylist) {
724 tmp = list_entry(this, struct dp83640_private, list);
725 ext_write(0, tmp->phydev, PAGE5, PSF_CFG0, tmp->cfg0);
726 }
727 ext_write(0, master, PAGE5, PSF_CFG0, cfg0);
728
729 mutex_unlock(&clock->extreg_lock);
730}
731
732/* time stamping methods */
733
734static inline u16 exts_chan_to_edata(int ch)
735{
736 return 1 << ((ch + EXT_EVENT) * 2);
737}
738
739static int decode_evnt(struct dp83640_private *dp83640,
740 void *data, int len, u16 ests)
741{
742 struct phy_txts *phy_txts;
743 struct ptp_clock_event event;
744 int i, parsed;
745 int words = (ests >> EVNT_TS_LEN_SHIFT) & EVNT_TS_LEN_MASK;
746 u16 ext_status = 0;
747
748 /* calculate length of the event timestamp status message */
749 if (ests & MULT_EVNT)
750 parsed = (words + 2) * sizeof(u16);
751 else
752 parsed = (words + 1) * sizeof(u16);
753
754 /* check if enough data is available */
755 if (len < parsed)
756 return len;
757
758 if (ests & MULT_EVNT) {
759 ext_status = *(u16 *) data;
760 data += sizeof(ext_status);
761 }
762
763 phy_txts = data;
764
765 switch (words) {
766 case 3:
767 dp83640->edata.sec_hi = phy_txts->sec_hi;
768 /* fall through */
769 case 2:
770 dp83640->edata.sec_lo = phy_txts->sec_lo;
771 /* fall through */
772 case 1:
773 dp83640->edata.ns_hi = phy_txts->ns_hi;
774 /* fall through */
775 case 0:
776 dp83640->edata.ns_lo = phy_txts->ns_lo;
777 }
778
779 if (!ext_status) {
780 i = ((ests >> EVNT_NUM_SHIFT) & EVNT_NUM_MASK) - EXT_EVENT;
781 ext_status = exts_chan_to_edata(i);
782 }
783
784 event.type = PTP_CLOCK_EXTTS;
785 event.timestamp = phy2txts(&dp83640->edata);
786
787 /* Compensate for input path and synchronization delays */
788 event.timestamp -= 35;
789
790 for (i = 0; i < N_EXT_TS; i++) {
791 if (ext_status & exts_chan_to_edata(i)) {
792 event.index = i;
793 ptp_clock_event(dp83640->clock->ptp_clock, &event);
794 }
795 }
796
797 return parsed;
798}
799
800#define DP83640_PACKET_HASH_OFFSET 20
801#define DP83640_PACKET_HASH_LEN 10
802
803static int match(struct sk_buff *skb, unsigned int type, struct rxts *rxts)
804{
805 u16 *seqid, hash;
806 unsigned int offset = 0;
807 u8 *msgtype, *data = skb_mac_header(skb);
808
809 /* check sequenceID, messageType, 12 bit hash of offset 20-29 */
810
811 if (type & PTP_CLASS_VLAN)
812 offset += VLAN_HLEN;
813
814 switch (type & PTP_CLASS_PMASK) {
815 case PTP_CLASS_IPV4:
816 offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN;
817 break;
818 case PTP_CLASS_IPV6:
819 offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
820 break;
821 case PTP_CLASS_L2:
822 offset += ETH_HLEN;
823 break;
824 default:
825 return 0;
826 }
827
828 if (skb->len + ETH_HLEN < offset + OFF_PTP_SEQUENCE_ID + sizeof(*seqid))
829 return 0;
830
831 if (unlikely(type & PTP_CLASS_V1))
832 msgtype = data + offset + OFF_PTP_CONTROL;
833 else
834 msgtype = data + offset;
835 if (rxts->msgtype != (*msgtype & 0xf))
836 return 0;
837
838 seqid = (u16 *)(data + offset + OFF_PTP_SEQUENCE_ID);
839 if (rxts->seqid != ntohs(*seqid))
840 return 0;
841
842 hash = ether_crc(DP83640_PACKET_HASH_LEN,
843 data + offset + DP83640_PACKET_HASH_OFFSET) >> 20;
844 if (rxts->hash != hash)
845 return 0;
846
847 return 1;
848}
849
850static void decode_rxts(struct dp83640_private *dp83640,
851 struct phy_rxts *phy_rxts)
852{
853 struct rxts *rxts;
854 struct skb_shared_hwtstamps *shhwtstamps = NULL;
855 struct sk_buff *skb;
856 unsigned long flags;
857 u8 overflow;
858
859 overflow = (phy_rxts->ns_hi >> 14) & 0x3;
860 if (overflow)
861 pr_debug("rx timestamp queue overflow, count %d\n", overflow);
862
863 spin_lock_irqsave(&dp83640->rx_lock, flags);
864
865 prune_rx_ts(dp83640);
866
867 if (list_empty(&dp83640->rxpool)) {
868 pr_debug("rx timestamp pool is empty\n");
869 goto out;
870 }
871 rxts = list_first_entry(&dp83640->rxpool, struct rxts, list);
872 list_del_init(&rxts->list);
873 phy2rxts(phy_rxts, rxts);
874
875 spin_lock(&dp83640->rx_queue.lock);
876 skb_queue_walk(&dp83640->rx_queue, skb) {
877 struct dp83640_skb_info *skb_info;
878
879 skb_info = (struct dp83640_skb_info *)skb->cb;
880 if (match(skb, skb_info->ptp_type, rxts)) {
881 __skb_unlink(skb, &dp83640->rx_queue);
882 shhwtstamps = skb_hwtstamps(skb);
883 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
884 shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns);
885 list_add(&rxts->list, &dp83640->rxpool);
886 break;
887 }
888 }
889 spin_unlock(&dp83640->rx_queue.lock);
890
891 if (!shhwtstamps)
892 list_add_tail(&rxts->list, &dp83640->rxts);
893out:
894 spin_unlock_irqrestore(&dp83640->rx_lock, flags);
895
896 if (shhwtstamps)
897 netif_rx_ni(skb);
898}
899
900static void decode_txts(struct dp83640_private *dp83640,
901 struct phy_txts *phy_txts)
902{
903 struct skb_shared_hwtstamps shhwtstamps;
904 struct dp83640_skb_info *skb_info;
905 struct sk_buff *skb;
906 u8 overflow;
907 u64 ns;
908
909 /* We must already have the skb that triggered this. */
910again:
911 skb = skb_dequeue(&dp83640->tx_queue);
912 if (!skb) {
913 pr_debug("have timestamp but tx_queue empty\n");
914 return;
915 }
916
917 overflow = (phy_txts->ns_hi >> 14) & 0x3;
918 if (overflow) {
919 pr_debug("tx timestamp queue overflow, count %d\n", overflow);
920 while (skb) {
921 kfree_skb(skb);
922 skb = skb_dequeue(&dp83640->tx_queue);
923 }
924 return;
925 }
926 skb_info = (struct dp83640_skb_info *)skb->cb;
927 if (time_after(jiffies, skb_info->tmo)) {
928 kfree_skb(skb);
929 goto again;
930 }
931
932 ns = phy2txts(phy_txts);
933 memset(&shhwtstamps, 0, sizeof(shhwtstamps));
934 shhwtstamps.hwtstamp = ns_to_ktime(ns);
935 skb_complete_tx_timestamp(skb, &shhwtstamps);
936}
937
938static void decode_status_frame(struct dp83640_private *dp83640,
939 struct sk_buff *skb)
940{
941 struct phy_rxts *phy_rxts;
942 struct phy_txts *phy_txts;
943 u8 *ptr;
944 int len, size;
945 u16 ests, type;
946
947 ptr = skb->data + 2;
948
949 for (len = skb_headlen(skb) - 2; len > sizeof(type); len -= size) {
950
951 type = *(u16 *)ptr;
952 ests = type & 0x0fff;
953 type = type & 0xf000;
954 len -= sizeof(type);
955 ptr += sizeof(type);
956
957 if (PSF_RX == type && len >= sizeof(*phy_rxts)) {
958
959 phy_rxts = (struct phy_rxts *) ptr;
960 decode_rxts(dp83640, phy_rxts);
961 size = sizeof(*phy_rxts);
962
963 } else if (PSF_TX == type && len >= sizeof(*phy_txts)) {
964
965 phy_txts = (struct phy_txts *) ptr;
966 decode_txts(dp83640, phy_txts);
967 size = sizeof(*phy_txts);
968
969 } else if (PSF_EVNT == type) {
970
971 size = decode_evnt(dp83640, ptr, len, ests);
972
973 } else {
974 size = 0;
975 break;
976 }
977 ptr += size;
978 }
979}
980
981static int is_sync(struct sk_buff *skb, int type)
982{
983 u8 *data = skb->data, *msgtype;
984 unsigned int offset = 0;
985
986 if (type & PTP_CLASS_VLAN)
987 offset += VLAN_HLEN;
988
989 switch (type & PTP_CLASS_PMASK) {
990 case PTP_CLASS_IPV4:
991 offset += ETH_HLEN + IPV4_HLEN(data + offset) + UDP_HLEN;
992 break;
993 case PTP_CLASS_IPV6:
994 offset += ETH_HLEN + IP6_HLEN + UDP_HLEN;
995 break;
996 case PTP_CLASS_L2:
997 offset += ETH_HLEN;
998 break;
999 default:
1000 return 0;
1001 }
1002
1003 if (type & PTP_CLASS_V1)
1004 offset += OFF_PTP_CONTROL;
1005
1006 if (skb->len < offset + 1)
1007 return 0;
1008
1009 msgtype = data + offset;
1010
1011 return (*msgtype & 0xf) == 0;
1012}
1013
1014static void dp83640_free_clocks(void)
1015{
1016 struct dp83640_clock *clock;
1017 struct list_head *this, *next;
1018
1019 mutex_lock(&phyter_clocks_lock);
1020
1021 list_for_each_safe(this, next, &phyter_clocks) {
1022 clock = list_entry(this, struct dp83640_clock, list);
1023 if (!list_empty(&clock->phylist)) {
1024 pr_warn("phy list non-empty while unloading\n");
1025 BUG();
1026 }
1027 list_del(&clock->list);
1028 mutex_destroy(&clock->extreg_lock);
1029 mutex_destroy(&clock->clock_lock);
1030 put_device(&clock->bus->dev);
1031 kfree(clock->caps.pin_config);
1032 kfree(clock);
1033 }
1034
1035 mutex_unlock(&phyter_clocks_lock);
1036}
1037
1038static void dp83640_clock_init(struct dp83640_clock *clock, struct mii_bus *bus)
1039{
1040 INIT_LIST_HEAD(&clock->list);
1041 clock->bus = bus;
1042 mutex_init(&clock->extreg_lock);
1043 mutex_init(&clock->clock_lock);
1044 INIT_LIST_HEAD(&clock->phylist);
1045 clock->caps.owner = THIS_MODULE;
1046 sprintf(clock->caps.name, "dp83640 timer");
1047 clock->caps.max_adj = 1953124;
1048 clock->caps.n_alarm = 0;
1049 clock->caps.n_ext_ts = N_EXT_TS;
1050 clock->caps.n_per_out = N_PER_OUT;
1051 clock->caps.n_pins = DP83640_N_PINS;
1052 clock->caps.pps = 0;
1053 clock->caps.adjfine = ptp_dp83640_adjfine;
1054 clock->caps.adjtime = ptp_dp83640_adjtime;
1055 clock->caps.gettime64 = ptp_dp83640_gettime;
1056 clock->caps.settime64 = ptp_dp83640_settime;
1057 clock->caps.enable = ptp_dp83640_enable;
1058 clock->caps.verify = ptp_dp83640_verify;
1059 /*
1060 * Convert the module param defaults into a dynamic pin configuration.
1061 */
1062 dp83640_gpio_defaults(clock->caps.pin_config);
1063 /*
1064 * Get a reference to this bus instance.
1065 */
1066 get_device(&bus->dev);
1067}
1068
1069static int choose_this_phy(struct dp83640_clock *clock,
1070 struct phy_device *phydev)
1071{
1072 if (chosen_phy == -1 && !clock->chosen)
1073 return 1;
1074
1075 if (chosen_phy == phydev->mdio.addr)
1076 return 1;
1077
1078 return 0;
1079}
1080
1081static struct dp83640_clock *dp83640_clock_get(struct dp83640_clock *clock)
1082{
1083 if (clock)
1084 mutex_lock(&clock->clock_lock);
1085 return clock;
1086}
1087
1088/*
1089 * Look up and lock a clock by bus instance.
1090 * If there is no clock for this bus, then create it first.
1091 */
1092static struct dp83640_clock *dp83640_clock_get_bus(struct mii_bus *bus)
1093{
1094 struct dp83640_clock *clock = NULL, *tmp;
1095 struct list_head *this;
1096
1097 mutex_lock(&phyter_clocks_lock);
1098
1099 list_for_each(this, &phyter_clocks) {
1100 tmp = list_entry(this, struct dp83640_clock, list);
1101 if (tmp->bus == bus) {
1102 clock = tmp;
1103 break;
1104 }
1105 }
1106 if (clock)
1107 goto out;
1108
1109 clock = kzalloc(sizeof(struct dp83640_clock), GFP_KERNEL);
1110 if (!clock)
1111 goto out;
1112
1113 clock->caps.pin_config = kcalloc(DP83640_N_PINS,
1114 sizeof(struct ptp_pin_desc),
1115 GFP_KERNEL);
1116 if (!clock->caps.pin_config) {
1117 kfree(clock);
1118 clock = NULL;
1119 goto out;
1120 }
1121 dp83640_clock_init(clock, bus);
1122 list_add_tail(&phyter_clocks, &clock->list);
1123out:
1124 mutex_unlock(&phyter_clocks_lock);
1125
1126 return dp83640_clock_get(clock);
1127}
1128
1129static void dp83640_clock_put(struct dp83640_clock *clock)
1130{
1131 mutex_unlock(&clock->clock_lock);
1132}
1133
1134static int dp83640_probe(struct phy_device *phydev)
1135{
1136 struct dp83640_clock *clock;
1137 struct dp83640_private *dp83640;
1138 int err = -ENOMEM, i;
1139
1140 if (phydev->mdio.addr == BROADCAST_ADDR)
1141 return 0;
1142
1143 clock = dp83640_clock_get_bus(phydev->mdio.bus);
1144 if (!clock)
1145 goto no_clock;
1146
1147 dp83640 = kzalloc(sizeof(struct dp83640_private), GFP_KERNEL);
1148 if (!dp83640)
1149 goto no_memory;
1150
1151 dp83640->phydev = phydev;
1152 INIT_DELAYED_WORK(&dp83640->ts_work, rx_timestamp_work);
1153
1154 INIT_LIST_HEAD(&dp83640->rxts);
1155 INIT_LIST_HEAD(&dp83640->rxpool);
1156 for (i = 0; i < MAX_RXTS; i++)
1157 list_add(&dp83640->rx_pool_data[i].list, &dp83640->rxpool);
1158
1159 phydev->priv = dp83640;
1160
1161 spin_lock_init(&dp83640->rx_lock);
1162 skb_queue_head_init(&dp83640->rx_queue);
1163 skb_queue_head_init(&dp83640->tx_queue);
1164
1165 dp83640->clock = clock;
1166
1167 if (choose_this_phy(clock, phydev)) {
1168 clock->chosen = dp83640;
1169 clock->ptp_clock = ptp_clock_register(&clock->caps,
1170 &phydev->mdio.dev);
1171 if (IS_ERR(clock->ptp_clock)) {
1172 err = PTR_ERR(clock->ptp_clock);
1173 goto no_register;
1174 }
1175 } else
1176 list_add_tail(&dp83640->list, &clock->phylist);
1177
1178 dp83640_clock_put(clock);
1179 return 0;
1180
1181no_register:
1182 clock->chosen = NULL;
1183 kfree(dp83640);
1184no_memory:
1185 dp83640_clock_put(clock);
1186no_clock:
1187 return err;
1188}
1189
1190static void dp83640_remove(struct phy_device *phydev)
1191{
1192 struct dp83640_clock *clock;
1193 struct list_head *this, *next;
1194 struct dp83640_private *tmp, *dp83640 = phydev->priv;
1195
1196 if (phydev->mdio.addr == BROADCAST_ADDR)
1197 return;
1198
1199 enable_status_frames(phydev, false);
1200 cancel_delayed_work_sync(&dp83640->ts_work);
1201
1202 skb_queue_purge(&dp83640->rx_queue);
1203 skb_queue_purge(&dp83640->tx_queue);
1204
1205 clock = dp83640_clock_get(dp83640->clock);
1206
1207 if (dp83640 == clock->chosen) {
1208 ptp_clock_unregister(clock->ptp_clock);
1209 clock->chosen = NULL;
1210 } else {
1211 list_for_each_safe(this, next, &clock->phylist) {
1212 tmp = list_entry(this, struct dp83640_private, list);
1213 if (tmp == dp83640) {
1214 list_del_init(&tmp->list);
1215 break;
1216 }
1217 }
1218 }
1219
1220 dp83640_clock_put(clock);
1221 kfree(dp83640);
1222}
1223
1224static int dp83640_soft_reset(struct phy_device *phydev)
1225{
1226 int ret;
1227
1228 ret = genphy_soft_reset(phydev);
1229 if (ret < 0)
1230 return ret;
1231
1232 /* From DP83640 datasheet: "Software driver code must wait 3 us
1233 * following a software reset before allowing further serial MII
1234 * operations with the DP83640."
1235 */
1236 udelay(10); /* Taking udelay inaccuracy into account */
1237
1238 return 0;
1239}
1240
1241static int dp83640_config_init(struct phy_device *phydev)
1242{
1243 struct dp83640_private *dp83640 = phydev->priv;
1244 struct dp83640_clock *clock = dp83640->clock;
1245
1246 if (clock->chosen && !list_empty(&clock->phylist))
1247 recalibrate(clock);
1248 else {
1249 mutex_lock(&clock->extreg_lock);
1250 enable_broadcast(phydev, clock->page, 1);
1251 mutex_unlock(&clock->extreg_lock);
1252 }
1253
1254 enable_status_frames(phydev, true);
1255
1256 mutex_lock(&clock->extreg_lock);
1257 ext_write(0, phydev, PAGE4, PTP_CTL, PTP_ENABLE);
1258 mutex_unlock(&clock->extreg_lock);
1259
1260 return 0;
1261}
1262
1263static int dp83640_ack_interrupt(struct phy_device *phydev)
1264{
1265 int err = phy_read(phydev, MII_DP83640_MISR);
1266
1267 if (err < 0)
1268 return err;
1269
1270 return 0;
1271}
1272
1273static int dp83640_config_intr(struct phy_device *phydev)
1274{
1275 int micr;
1276 int misr;
1277 int err;
1278
1279 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
1280 misr = phy_read(phydev, MII_DP83640_MISR);
1281 if (misr < 0)
1282 return misr;
1283 misr |=
1284 (MII_DP83640_MISR_ANC_INT_EN |
1285 MII_DP83640_MISR_DUP_INT_EN |
1286 MII_DP83640_MISR_SPD_INT_EN |
1287 MII_DP83640_MISR_LINK_INT_EN);
1288 err = phy_write(phydev, MII_DP83640_MISR, misr);
1289 if (err < 0)
1290 return err;
1291
1292 micr = phy_read(phydev, MII_DP83640_MICR);
1293 if (micr < 0)
1294 return micr;
1295 micr |=
1296 (MII_DP83640_MICR_OE |
1297 MII_DP83640_MICR_IE);
1298 return phy_write(phydev, MII_DP83640_MICR, micr);
1299 } else {
1300 micr = phy_read(phydev, MII_DP83640_MICR);
1301 if (micr < 0)
1302 return micr;
1303 micr &=
1304 ~(MII_DP83640_MICR_OE |
1305 MII_DP83640_MICR_IE);
1306 err = phy_write(phydev, MII_DP83640_MICR, micr);
1307 if (err < 0)
1308 return err;
1309
1310 misr = phy_read(phydev, MII_DP83640_MISR);
1311 if (misr < 0)
1312 return misr;
1313 misr &=
1314 ~(MII_DP83640_MISR_ANC_INT_EN |
1315 MII_DP83640_MISR_DUP_INT_EN |
1316 MII_DP83640_MISR_SPD_INT_EN |
1317 MII_DP83640_MISR_LINK_INT_EN);
1318 return phy_write(phydev, MII_DP83640_MISR, misr);
1319 }
1320}
1321
1322static int dp83640_hwtstamp(struct phy_device *phydev, struct ifreq *ifr)
1323{
1324 struct dp83640_private *dp83640 = phydev->priv;
1325 struct hwtstamp_config cfg;
1326 u16 txcfg0, rxcfg0;
1327
1328 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1329 return -EFAULT;
1330
1331 if (cfg.flags) /* reserved for future extensions */
1332 return -EINVAL;
1333
1334 if (cfg.tx_type < 0 || cfg.tx_type > HWTSTAMP_TX_ONESTEP_SYNC)
1335 return -ERANGE;
1336
1337 dp83640->hwts_tx_en = cfg.tx_type;
1338
1339 switch (cfg.rx_filter) {
1340 case HWTSTAMP_FILTER_NONE:
1341 dp83640->hwts_rx_en = 0;
1342 dp83640->layer = 0;
1343 dp83640->version = 0;
1344 break;
1345 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1346 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1347 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1348 dp83640->hwts_rx_en = 1;
1349 dp83640->layer = PTP_CLASS_L4;
1350 dp83640->version = PTP_CLASS_V1;
1351 break;
1352 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1353 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1354 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1355 dp83640->hwts_rx_en = 1;
1356 dp83640->layer = PTP_CLASS_L4;
1357 dp83640->version = PTP_CLASS_V2;
1358 break;
1359 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1360 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1361 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1362 dp83640->hwts_rx_en = 1;
1363 dp83640->layer = PTP_CLASS_L2;
1364 dp83640->version = PTP_CLASS_V2;
1365 break;
1366 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1367 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1368 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1369 dp83640->hwts_rx_en = 1;
1370 dp83640->layer = PTP_CLASS_L4 | PTP_CLASS_L2;
1371 dp83640->version = PTP_CLASS_V2;
1372 break;
1373 default:
1374 return -ERANGE;
1375 }
1376
1377 txcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT;
1378 rxcfg0 = (dp83640->version & TX_PTP_VER_MASK) << TX_PTP_VER_SHIFT;
1379
1380 if (dp83640->layer & PTP_CLASS_L2) {
1381 txcfg0 |= TX_L2_EN;
1382 rxcfg0 |= RX_L2_EN;
1383 }
1384 if (dp83640->layer & PTP_CLASS_L4) {
1385 txcfg0 |= TX_IPV6_EN | TX_IPV4_EN;
1386 rxcfg0 |= RX_IPV6_EN | RX_IPV4_EN;
1387 }
1388
1389 if (dp83640->hwts_tx_en)
1390 txcfg0 |= TX_TS_EN;
1391
1392 if (dp83640->hwts_tx_en == HWTSTAMP_TX_ONESTEP_SYNC)
1393 txcfg0 |= SYNC_1STEP | CHK_1STEP;
1394
1395 if (dp83640->hwts_rx_en)
1396 rxcfg0 |= RX_TS_EN;
1397
1398 mutex_lock(&dp83640->clock->extreg_lock);
1399
1400 ext_write(0, phydev, PAGE5, PTP_TXCFG0, txcfg0);
1401 ext_write(0, phydev, PAGE5, PTP_RXCFG0, rxcfg0);
1402
1403 mutex_unlock(&dp83640->clock->extreg_lock);
1404
1405 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1406}
1407
1408static void rx_timestamp_work(struct work_struct *work)
1409{
1410 struct dp83640_private *dp83640 =
1411 container_of(work, struct dp83640_private, ts_work.work);
1412 struct sk_buff *skb;
1413
1414 /* Deliver expired packets. */
1415 while ((skb = skb_dequeue(&dp83640->rx_queue))) {
1416 struct dp83640_skb_info *skb_info;
1417
1418 skb_info = (struct dp83640_skb_info *)skb->cb;
1419 if (!time_after(jiffies, skb_info->tmo)) {
1420 skb_queue_head(&dp83640->rx_queue, skb);
1421 break;
1422 }
1423
1424 netif_rx_ni(skb);
1425 }
1426
1427 if (!skb_queue_empty(&dp83640->rx_queue))
1428 schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT);
1429}
1430
1431static bool dp83640_rxtstamp(struct phy_device *phydev,
1432 struct sk_buff *skb, int type)
1433{
1434 struct dp83640_private *dp83640 = phydev->priv;
1435 struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
1436 struct list_head *this, *next;
1437 struct rxts *rxts;
1438 struct skb_shared_hwtstamps *shhwtstamps = NULL;
1439 unsigned long flags;
1440
1441 if (is_status_frame(skb, type)) {
1442 decode_status_frame(dp83640, skb);
1443 kfree_skb(skb);
1444 return true;
1445 }
1446
1447 if (!dp83640->hwts_rx_en)
1448 return false;
1449
1450 if ((type & dp83640->version) == 0 || (type & dp83640->layer) == 0)
1451 return false;
1452
1453 spin_lock_irqsave(&dp83640->rx_lock, flags);
1454 prune_rx_ts(dp83640);
1455 list_for_each_safe(this, next, &dp83640->rxts) {
1456 rxts = list_entry(this, struct rxts, list);
1457 if (match(skb, type, rxts)) {
1458 shhwtstamps = skb_hwtstamps(skb);
1459 memset(shhwtstamps, 0, sizeof(*shhwtstamps));
1460 shhwtstamps->hwtstamp = ns_to_ktime(rxts->ns);
1461 list_del_init(&rxts->list);
1462 list_add(&rxts->list, &dp83640->rxpool);
1463 break;
1464 }
1465 }
1466 spin_unlock_irqrestore(&dp83640->rx_lock, flags);
1467
1468 if (!shhwtstamps) {
1469 skb_info->ptp_type = type;
1470 skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
1471 skb_queue_tail(&dp83640->rx_queue, skb);
1472 schedule_delayed_work(&dp83640->ts_work, SKB_TIMESTAMP_TIMEOUT);
1473 } else {
1474 netif_rx_ni(skb);
1475 }
1476
1477 return true;
1478}
1479
1480static void dp83640_txtstamp(struct phy_device *phydev,
1481 struct sk_buff *skb, int type)
1482{
1483 struct dp83640_skb_info *skb_info = (struct dp83640_skb_info *)skb->cb;
1484 struct dp83640_private *dp83640 = phydev->priv;
1485
1486 switch (dp83640->hwts_tx_en) {
1487
1488 case HWTSTAMP_TX_ONESTEP_SYNC:
1489 if (is_sync(skb, type)) {
1490 kfree_skb(skb);
1491 return;
1492 }
1493 /* fall through */
1494 case HWTSTAMP_TX_ON:
1495 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
1496 skb_info->tmo = jiffies + SKB_TIMESTAMP_TIMEOUT;
1497 skb_queue_tail(&dp83640->tx_queue, skb);
1498 break;
1499
1500 case HWTSTAMP_TX_OFF:
1501 default:
1502 kfree_skb(skb);
1503 break;
1504 }
1505}
1506
1507static int dp83640_ts_info(struct phy_device *dev, struct ethtool_ts_info *info)
1508{
1509 struct dp83640_private *dp83640 = dev->priv;
1510
1511 info->so_timestamping =
1512 SOF_TIMESTAMPING_TX_HARDWARE |
1513 SOF_TIMESTAMPING_RX_HARDWARE |
1514 SOF_TIMESTAMPING_RAW_HARDWARE;
1515 info->phc_index = ptp_clock_index(dp83640->clock->ptp_clock);
1516 info->tx_types =
1517 (1 << HWTSTAMP_TX_OFF) |
1518 (1 << HWTSTAMP_TX_ON) |
1519 (1 << HWTSTAMP_TX_ONESTEP_SYNC);
1520 info->rx_filters =
1521 (1 << HWTSTAMP_FILTER_NONE) |
1522 (1 << HWTSTAMP_FILTER_PTP_V1_L4_EVENT) |
1523 (1 << HWTSTAMP_FILTER_PTP_V2_L4_EVENT) |
1524 (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT) |
1525 (1 << HWTSTAMP_FILTER_PTP_V2_EVENT);
1526 return 0;
1527}
1528
1529static struct phy_driver dp83640_driver = {
1530 .phy_id = DP83640_PHY_ID,
1531 .phy_id_mask = 0xfffffff0,
1532 .name = "NatSemi DP83640",
1533 /* PHY_BASIC_FEATURES */
1534 .probe = dp83640_probe,
1535 .remove = dp83640_remove,
1536 .soft_reset = dp83640_soft_reset,
1537 .config_init = dp83640_config_init,
1538 .ack_interrupt = dp83640_ack_interrupt,
1539 .config_intr = dp83640_config_intr,
1540 .ts_info = dp83640_ts_info,
1541 .hwtstamp = dp83640_hwtstamp,
1542 .rxtstamp = dp83640_rxtstamp,
1543 .txtstamp = dp83640_txtstamp,
1544};
1545
1546static int __init dp83640_init(void)
1547{
1548 return phy_driver_register(&dp83640_driver, THIS_MODULE);
1549}
1550
1551static void __exit dp83640_exit(void)
1552{
1553 dp83640_free_clocks();
1554 phy_driver_unregister(&dp83640_driver);
1555}
1556
1557MODULE_DESCRIPTION("National Semiconductor DP83640 PHY driver");
1558MODULE_AUTHOR("Richard Cochran <richardcochran@gmail.com>");
1559MODULE_LICENSE("GPL");
1560
1561module_init(dp83640_init);
1562module_exit(dp83640_exit);
1563
1564static struct mdio_device_id __maybe_unused dp83640_tbl[] = {
1565 { DP83640_PHY_ID, 0xfffffff0 },
1566 { }
1567};
1568
1569MODULE_DEVICE_TABLE(mdio, dp83640_tbl);