1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* Copyright (C) 2018 Microchip Technology Inc. */
3 
4 #include <linux/netdevice.h>
5 
6 #include <linux/ptp_clock_kernel.h>
7 #include <linux/module.h>
8 #include <linux/pci.h>
9 #include <linux/net_tstamp.h>
10 #include "lan743x_main.h"
11 
12 #include "lan743x_ptp.h"
13 
14 #define LAN743X_LED0_ENABLE		20	/* LED0 offset in HW_CFG */
15 #define LAN743X_LED_ENABLE(pin)		BIT(LAN743X_LED0_ENABLE + (pin))
16 
17 #define LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB		(31249999)
18 #define LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM	(2047999934)
19 
20 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter);
21 static void lan743x_ptp_enable(struct lan743x_adapter *adapter);
22 static void lan743x_ptp_disable(struct lan743x_adapter *adapter);
23 static void lan743x_ptp_reset(struct lan743x_adapter *adapter);
24 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
25 				  u32 seconds, u32 nano_seconds,
26 				  u32 sub_nano_seconds);
27 
28 int lan743x_gpio_init(struct lan743x_adapter *adapter)
29 {
30 	struct lan743x_gpio *gpio = &adapter->gpio;
31 
32 	spin_lock_init(&gpio->gpio_lock);
33 
34 	gpio->gpio_cfg0 = 0; /* set all direction to input, data = 0 */
35 	gpio->gpio_cfg1 = 0x0FFF0000;/* disable all gpio, set to open drain */
36 	gpio->gpio_cfg2 = 0;/* set all to 1588 low polarity level */
37 	gpio->gpio_cfg3 = 0;/* disable all 1588 output */
38 	lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
39 	lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
40 	lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
41 	lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
42 
43 	return 0;
44 }
45 
46 static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter,
47 					   u32 bit_mask)
48 {
49 	int timeout = 1000;
50 	u32 data = 0;
51 
52 	while (timeout &&
53 	       (data = (lan743x_csr_read(adapter, PTP_CMD_CTL) &
54 	       bit_mask))) {
55 		usleep_range(1000, 20000);
56 		timeout--;
57 	}
58 	if (data) {
59 		netif_err(adapter, drv, adapter->netdev,
60 			  "timeout waiting for cmd to be done, cmd = 0x%08X\n",
61 			  bit_mask);
62 	}
63 }
64 
65 static void lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter *adapter,
66 					 u32 seconds, u32 nano_seconds,
67 					 u32 header)
68 {
69 	struct lan743x_ptp *ptp = &adapter->ptp;
70 
71 	spin_lock_bh(&ptp->tx_ts_lock);
72 	if (ptp->tx_ts_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
73 		ptp->tx_ts_seconds_queue[ptp->tx_ts_queue_size] = seconds;
74 		ptp->tx_ts_nseconds_queue[ptp->tx_ts_queue_size] = nano_seconds;
75 		ptp->tx_ts_header_queue[ptp->tx_ts_queue_size] = header;
76 		ptp->tx_ts_queue_size++;
77 	} else {
78 		netif_err(adapter, drv, adapter->netdev,
79 			  "tx ts queue overflow\n");
80 	}
81 	spin_unlock_bh(&ptp->tx_ts_lock);
82 }
83 
84 static void lan743x_ptp_tx_ts_complete(struct lan743x_adapter *adapter)
85 {
86 	struct lan743x_ptp *ptp = &adapter->ptp;
87 	struct skb_shared_hwtstamps tstamps;
88 	u32 header, nseconds, seconds;
89 	bool ignore_sync = false;
90 	struct sk_buff *skb;
91 	int c, i;
92 
93 	spin_lock_bh(&ptp->tx_ts_lock);
94 	c = ptp->tx_ts_skb_queue_size;
95 
96 	if (c > ptp->tx_ts_queue_size)
97 		c = ptp->tx_ts_queue_size;
98 	if (c <= 0)
99 		goto done;
100 
101 	for (i = 0; i < c; i++) {
102 		ignore_sync = ((ptp->tx_ts_ignore_sync_queue &
103 				BIT(i)) != 0);
104 		skb = ptp->tx_ts_skb_queue[i];
105 		nseconds = ptp->tx_ts_nseconds_queue[i];
106 		seconds = ptp->tx_ts_seconds_queue[i];
107 		header = ptp->tx_ts_header_queue[i];
108 
109 		memset(&tstamps, 0, sizeof(tstamps));
110 		tstamps.hwtstamp = ktime_set(seconds, nseconds);
111 		if (!ignore_sync ||
112 		    ((header & PTP_TX_MSG_HEADER_MSG_TYPE_) !=
113 		    PTP_TX_MSG_HEADER_MSG_TYPE_SYNC_))
114 			skb_tstamp_tx(skb, &tstamps);
115 
116 		dev_kfree_skb(skb);
117 
118 		ptp->tx_ts_skb_queue[i] = NULL;
119 		ptp->tx_ts_seconds_queue[i] = 0;
120 		ptp->tx_ts_nseconds_queue[i] = 0;
121 		ptp->tx_ts_header_queue[i] = 0;
122 	}
123 
124 	/* shift queue */
125 	ptp->tx_ts_ignore_sync_queue >>= c;
126 	for (i = c; i < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; i++) {
127 		ptp->tx_ts_skb_queue[i - c] = ptp->tx_ts_skb_queue[i];
128 		ptp->tx_ts_seconds_queue[i - c] = ptp->tx_ts_seconds_queue[i];
129 		ptp->tx_ts_nseconds_queue[i - c] = ptp->tx_ts_nseconds_queue[i];
130 		ptp->tx_ts_header_queue[i - c] = ptp->tx_ts_header_queue[i];
131 
132 		ptp->tx_ts_skb_queue[i] = NULL;
133 		ptp->tx_ts_seconds_queue[i] = 0;
134 		ptp->tx_ts_nseconds_queue[i] = 0;
135 		ptp->tx_ts_header_queue[i] = 0;
136 	}
137 	ptp->tx_ts_skb_queue_size -= c;
138 	ptp->tx_ts_queue_size -= c;
139 done:
140 	ptp->pending_tx_timestamps -= c;
141 	spin_unlock_bh(&ptp->tx_ts_lock);
142 }
143 
144 static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter,
145 					int event_channel)
146 {
147 	struct lan743x_ptp *ptp = &adapter->ptp;
148 	int result = -ENODEV;
149 
150 	mutex_lock(&ptp->command_lock);
151 	if (!(test_bit(event_channel, &ptp->used_event_ch))) {
152 		ptp->used_event_ch |= BIT(event_channel);
153 		result = event_channel;
154 	} else {
155 		netif_warn(adapter, drv, adapter->netdev,
156 			   "attempted to reserved a used event_channel = %d\n",
157 			   event_channel);
158 	}
159 	mutex_unlock(&ptp->command_lock);
160 	return result;
161 }
162 
163 static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter,
164 					 int event_channel)
165 {
166 	struct lan743x_ptp *ptp = &adapter->ptp;
167 
168 	mutex_lock(&ptp->command_lock);
169 	if (test_bit(event_channel, &ptp->used_event_ch)) {
170 		ptp->used_event_ch &= ~BIT(event_channel);
171 	} else {
172 		netif_warn(adapter, drv, adapter->netdev,
173 			   "attempted release on a not used event_channel = %d\n",
174 			   event_channel);
175 	}
176 	mutex_unlock(&ptp->command_lock);
177 }
178 
179 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
180 				  u32 *seconds, u32 *nano_seconds,
181 				  u32 *sub_nano_seconds);
182 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
183 				   s64 time_step_ns);
184 
185 static void lan743x_led_mux_enable(struct lan743x_adapter *adapter,
186 				   int pin, bool enable)
187 {
188 	struct lan743x_ptp *ptp = &adapter->ptp;
189 
190 	if (ptp->leds_multiplexed &&
191 	    ptp->led_enabled[pin]) {
192 		u32 val = lan743x_csr_read(adapter, HW_CFG);
193 
194 		if (enable)
195 			val |= LAN743X_LED_ENABLE(pin);
196 		else
197 			val &= ~LAN743X_LED_ENABLE(pin);
198 
199 		lan743x_csr_write(adapter, HW_CFG, val);
200 	}
201 }
202 
203 static void lan743x_led_mux_save(struct lan743x_adapter *adapter)
204 {
205 	struct lan743x_ptp *ptp = &adapter->ptp;
206 	u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
207 
208 	if (id_rev == ID_REV_ID_LAN7430_) {
209 		int i;
210 		u32 val = lan743x_csr_read(adapter, HW_CFG);
211 
212 		for (i = 0; i < LAN7430_N_LED; i++) {
213 			bool led_enabled = (val & LAN743X_LED_ENABLE(i)) != 0;
214 
215 			ptp->led_enabled[i] = led_enabled;
216 		}
217 		ptp->leds_multiplexed = true;
218 	} else {
219 		ptp->leds_multiplexed = false;
220 	}
221 }
222 
223 static void lan743x_led_mux_restore(struct lan743x_adapter *adapter)
224 {
225 	u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
226 
227 	if (id_rev == ID_REV_ID_LAN7430_) {
228 		int i;
229 
230 		for (i = 0; i < LAN7430_N_LED; i++)
231 			lan743x_led_mux_enable(adapter, i, true);
232 	}
233 }
234 
235 static int lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter *adapter,
236 				     int pin, int event_channel)
237 {
238 	struct lan743x_gpio *gpio = &adapter->gpio;
239 	unsigned long irq_flags = 0;
240 	int bit_mask = BIT(pin);
241 	int ret = -EBUSY;
242 
243 	spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
244 
245 	if (!(gpio->used_bits & bit_mask)) {
246 		gpio->used_bits |= bit_mask;
247 		gpio->output_bits |= bit_mask;
248 		gpio->ptp_bits |= bit_mask;
249 
250 		/* assign pin to GPIO function */
251 		lan743x_led_mux_enable(adapter, pin, false);
252 
253 		/* set as output, and zero initial value */
254 		gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_BIT_(pin);
255 		gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
256 		lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
257 
258 		/* enable gpio, and set buffer type to push pull */
259 		gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOEN_BIT_(pin);
260 		gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_BIT_(pin);
261 		lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
262 
263 		/* set 1588 polarity to high */
264 		gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_BIT_(pin);
265 		lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
266 
267 		if (event_channel == 0) {
268 			/* use channel A */
269 			gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_BIT_(pin);
270 		} else {
271 			/* use channel B */
272 			gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_BIT_(pin);
273 		}
274 		gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_BIT_(pin);
275 		lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
276 
277 		ret = pin;
278 	}
279 	spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
280 	return ret;
281 }
282 
283 static void lan743x_gpio_release(struct lan743x_adapter *adapter, int pin)
284 {
285 	struct lan743x_gpio *gpio = &adapter->gpio;
286 	unsigned long irq_flags = 0;
287 	int bit_mask = BIT(pin);
288 
289 	spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
290 	if (gpio->used_bits & bit_mask) {
291 		gpio->used_bits &= ~bit_mask;
292 		if (gpio->output_bits & bit_mask) {
293 			gpio->output_bits &= ~bit_mask;
294 
295 			if (gpio->ptp_bits & bit_mask) {
296 				gpio->ptp_bits &= ~bit_mask;
297 				/* disable ptp output */
298 				gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_OE_BIT_(pin);
299 				lan743x_csr_write(adapter, GPIO_CFG3,
300 						  gpio->gpio_cfg3);
301 			}
302 			/* release gpio output */
303 
304 			/* disable gpio */
305 			gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_BIT_(pin);
306 			gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_BIT_(pin);
307 			lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
308 
309 			/* reset back to input */
310 			gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_BIT_(pin);
311 			gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
312 			lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
313 
314 			/* assign pin to original function */
315 			lan743x_led_mux_enable(adapter, pin, true);
316 		}
317 	}
318 	spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
319 }
320 
321 static int lan743x_ptpci_adjfine(struct ptp_clock_info *ptpci, long scaled_ppm)
322 {
323 	struct lan743x_ptp *ptp =
324 		container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
325 	struct lan743x_adapter *adapter =
326 		container_of(ptp, struct lan743x_adapter, ptp);
327 	u32 lan743x_rate_adj = 0;
328 	bool positive = true;
329 	u64 u64_delta = 0;
330 
331 	if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) ||
332 	    scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) {
333 		return -EINVAL;
334 	}
335 	if (scaled_ppm > 0) {
336 		u64_delta = (u64)scaled_ppm;
337 		positive = true;
338 	} else {
339 		u64_delta = (u64)(-scaled_ppm);
340 		positive = false;
341 	}
342 	u64_delta = (u64_delta << 19);
343 	lan743x_rate_adj = div_u64(u64_delta, 1000000);
344 
345 	if (positive)
346 		lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
347 
348 	lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
349 			  lan743x_rate_adj);
350 
351 	return 0;
352 }
353 
354 static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb)
355 {
356 	struct lan743x_ptp *ptp =
357 		container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
358 	struct lan743x_adapter *adapter =
359 		container_of(ptp, struct lan743x_adapter, ptp);
360 	u32 lan743x_rate_adj = 0;
361 	bool positive = true;
362 	u32 u32_delta = 0;
363 	u64 u64_delta = 0;
364 
365 	if ((delta_ppb < (-LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) ||
366 	    delta_ppb > LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB) {
367 		return -EINVAL;
368 	}
369 	if (delta_ppb > 0) {
370 		u32_delta = (u32)delta_ppb;
371 		positive = true;
372 	} else {
373 		u32_delta = (u32)(-delta_ppb);
374 		positive = false;
375 	}
376 	u64_delta = (((u64)u32_delta) << 35);
377 	lan743x_rate_adj = div_u64(u64_delta, 1000000000);
378 
379 	if (positive)
380 		lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
381 
382 	lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
383 			  lan743x_rate_adj);
384 
385 	return 0;
386 }
387 
388 static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
389 {
390 	struct lan743x_ptp *ptp =
391 		container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
392 	struct lan743x_adapter *adapter =
393 		container_of(ptp, struct lan743x_adapter, ptp);
394 
395 	lan743x_ptp_clock_step(adapter, delta);
396 
397 	return 0;
398 }
399 
400 static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci,
401 				   struct timespec64 *ts)
402 {
403 	struct lan743x_ptp *ptp =
404 		container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
405 	struct lan743x_adapter *adapter =
406 		container_of(ptp, struct lan743x_adapter, ptp);
407 	u32 nano_seconds = 0;
408 	u32 seconds = 0;
409 
410 	lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
411 	ts->tv_sec = seconds;
412 	ts->tv_nsec = nano_seconds;
413 
414 	return 0;
415 }
416 
417 static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci,
418 				   const struct timespec64 *ts)
419 {
420 	struct lan743x_ptp *ptp =
421 		container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
422 	struct lan743x_adapter *adapter =
423 		container_of(ptp, struct lan743x_adapter, ptp);
424 	u32 nano_seconds = 0;
425 	u32 seconds = 0;
426 
427 	if (ts) {
428 		if (ts->tv_sec > 0xFFFFFFFFLL ||
429 		    ts->tv_sec < 0) {
430 			netif_warn(adapter, drv, adapter->netdev,
431 				   "ts->tv_sec out of range, %lld\n",
432 				   ts->tv_sec);
433 			return -ERANGE;
434 		}
435 		if (ts->tv_nsec >= 1000000000L ||
436 		    ts->tv_nsec < 0) {
437 			netif_warn(adapter, drv, adapter->netdev,
438 				   "ts->tv_nsec out of range, %ld\n",
439 				   ts->tv_nsec);
440 			return -ERANGE;
441 		}
442 		seconds = ts->tv_sec;
443 		nano_seconds = ts->tv_nsec;
444 		lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
445 	} else {
446 		netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n");
447 		return -EINVAL;
448 	}
449 
450 	return 0;
451 }
452 
453 static void lan743x_ptp_perout_off(struct lan743x_adapter *adapter,
454 				   unsigned int index)
455 {
456 	struct lan743x_ptp *ptp = &adapter->ptp;
457 	u32 general_config = 0;
458 	struct lan743x_ptp_perout *perout = &ptp->perout[index];
459 
460 	if (perout->gpio_pin >= 0) {
461 		lan743x_gpio_release(adapter, perout->gpio_pin);
462 		perout->gpio_pin = -1;
463 	}
464 
465 	if (perout->event_ch >= 0) {
466 		/* set target to far in the future, effectively disabling it */
467 		lan743x_csr_write(adapter,
468 				  PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
469 				  0xFFFF0000);
470 		lan743x_csr_write(adapter,
471 				  PTP_CLOCK_TARGET_NS_X(perout->event_ch),
472 				  0);
473 
474 		general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
475 		general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_
476 				  (perout->event_ch);
477 		lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
478 		lan743x_ptp_release_event_ch(adapter, perout->event_ch);
479 		perout->event_ch = -1;
480 	}
481 }
482 
483 static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on,
484 			      struct ptp_perout_request *perout_request)
485 {
486 	struct lan743x_ptp *ptp = &adapter->ptp;
487 	u32 period_sec = 0, period_nsec = 0;
488 	u32 start_sec = 0, start_nsec = 0;
489 	u32 general_config = 0;
490 	int pulse_width = 0;
491 	int perout_pin = 0;
492 	unsigned int index = perout_request->index;
493 	struct lan743x_ptp_perout *perout = &ptp->perout[index];
494 
495 	/* Reject requests with unsupported flags */
496 	if (perout_request->flags)
497 		return -EOPNOTSUPP;
498 
499 	if (on) {
500 		perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT,
501 					  perout_request->index);
502 		if (perout_pin < 0)
503 			return -EBUSY;
504 	} else {
505 		lan743x_ptp_perout_off(adapter, index);
506 		return 0;
507 	}
508 
509 	if (perout->event_ch >= 0 ||
510 	    perout->gpio_pin >= 0) {
511 		/* already on, turn off first */
512 		lan743x_ptp_perout_off(adapter, index);
513 	}
514 
515 	perout->event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
516 
517 	if (perout->event_ch < 0) {
518 		netif_warn(adapter, drv, adapter->netdev,
519 			   "Failed to reserve event channel %d for PEROUT\n",
520 			   index);
521 		goto failed;
522 	}
523 
524 	perout->gpio_pin = lan743x_gpio_rsrv_ptp_out(adapter,
525 						     perout_pin,
526 						     perout->event_ch);
527 
528 	if (perout->gpio_pin < 0) {
529 		netif_warn(adapter, drv, adapter->netdev,
530 			   "Failed to reserve gpio %d for PEROUT\n",
531 			   perout_pin);
532 		goto failed;
533 	}
534 
535 	start_sec = perout_request->start.sec;
536 	start_sec += perout_request->start.nsec / 1000000000;
537 	start_nsec = perout_request->start.nsec % 1000000000;
538 
539 	period_sec = perout_request->period.sec;
540 	period_sec += perout_request->period.nsec / 1000000000;
541 	period_nsec = perout_request->period.nsec % 1000000000;
542 
543 	if (period_sec == 0) {
544 		if (period_nsec >= 400000000) {
545 			pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
546 		} else if (period_nsec >= 20000000) {
547 			pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
548 		} else if (period_nsec >= 2000000) {
549 			pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
550 		} else if (period_nsec >= 200000) {
551 			pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
552 		} else if (period_nsec >= 20000) {
553 			pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
554 		} else if (period_nsec >= 200) {
555 			pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
556 		} else {
557 			netif_warn(adapter, drv, adapter->netdev,
558 				   "perout period too small, minimum is 200nS\n");
559 			goto failed;
560 		}
561 	} else {
562 		pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
563 	}
564 
565 	/* turn off by setting target far in future */
566 	lan743x_csr_write(adapter,
567 			  PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
568 			  0xFFFF0000);
569 	lan743x_csr_write(adapter,
570 			  PTP_CLOCK_TARGET_NS_X(perout->event_ch), 0);
571 
572 	/* Configure to pulse every period */
573 	general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
574 	general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
575 			  (perout->event_ch));
576 	general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
577 			  (perout->event_ch, pulse_width);
578 	general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_
579 			  (perout->event_ch);
580 	lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
581 
582 	/* set the reload to one toggle cycle */
583 	lan743x_csr_write(adapter,
584 			  PTP_CLOCK_TARGET_RELOAD_SEC_X(perout->event_ch),
585 			  period_sec);
586 	lan743x_csr_write(adapter,
587 			  PTP_CLOCK_TARGET_RELOAD_NS_X(perout->event_ch),
588 			  period_nsec);
589 
590 	/* set the start time */
591 	lan743x_csr_write(adapter,
592 			  PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
593 			  start_sec);
594 	lan743x_csr_write(adapter,
595 			  PTP_CLOCK_TARGET_NS_X(perout->event_ch),
596 			  start_nsec);
597 
598 	return 0;
599 
600 failed:
601 	lan743x_ptp_perout_off(adapter, index);
602 	return -ENODEV;
603 }
604 
605 static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci,
606 				struct ptp_clock_request *request, int on)
607 {
608 	struct lan743x_ptp *ptp =
609 		container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
610 	struct lan743x_adapter *adapter =
611 		container_of(ptp, struct lan743x_adapter, ptp);
612 
613 	if (request) {
614 		switch (request->type) {
615 		case PTP_CLK_REQ_EXTTS:
616 			return -EINVAL;
617 		case PTP_CLK_REQ_PEROUT:
618 			if (request->perout.index < ptpci->n_per_out)
619 				return lan743x_ptp_perout(adapter, on,
620 							  &request->perout);
621 			return -EINVAL;
622 		case PTP_CLK_REQ_PPS:
623 			return -EINVAL;
624 		default:
625 			netif_err(adapter, drv, adapter->netdev,
626 				  "request->type == %d, Unknown\n",
627 				  request->type);
628 			break;
629 		}
630 	} else {
631 		netif_err(adapter, drv, adapter->netdev, "request == NULL\n");
632 	}
633 	return 0;
634 }
635 
636 static int lan743x_ptpci_verify_pin_config(struct ptp_clock_info *ptp,
637 					   unsigned int pin,
638 					   enum ptp_pin_function func,
639 					   unsigned int chan)
640 {
641 	int result = 0;
642 
643 	/* Confirm the requested function is supported. Parameter
644 	 * validation is done by the caller.
645 	 */
646 	switch (func) {
647 	case PTP_PF_NONE:
648 	case PTP_PF_PEROUT:
649 		break;
650 	case PTP_PF_EXTTS:
651 	case PTP_PF_PHYSYNC:
652 	default:
653 		result = -1;
654 		break;
655 	}
656 	return result;
657 }
658 
659 static long lan743x_ptpci_do_aux_work(struct ptp_clock_info *ptpci)
660 {
661 	struct lan743x_ptp *ptp =
662 		container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
663 	struct lan743x_adapter *adapter =
664 		container_of(ptp, struct lan743x_adapter, ptp);
665 	u32 cap_info, cause, header, nsec, seconds;
666 	bool new_timestamp_available = false;
667 	int count = 0;
668 
669 	while ((count < 100) &&
670 	       (lan743x_csr_read(adapter, PTP_INT_STS) & PTP_INT_BIT_TX_TS_)) {
671 		count++;
672 		cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO);
673 
674 		if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) {
675 			seconds = lan743x_csr_read(adapter,
676 						   PTP_TX_EGRESS_SEC);
677 			nsec = lan743x_csr_read(adapter, PTP_TX_EGRESS_NS);
678 			cause = (nsec &
679 				 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_);
680 			header = lan743x_csr_read(adapter,
681 						  PTP_TX_MSG_HEADER);
682 
683 			if (cause == PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) {
684 				nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_;
685 				lan743x_ptp_tx_ts_enqueue_ts(adapter,
686 							     seconds, nsec,
687 							     header);
688 				new_timestamp_available = true;
689 			} else if (cause ==
690 				PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) {
691 				netif_err(adapter, drv, adapter->netdev,
692 					  "Auto capture cause not supported\n");
693 			} else {
694 				netif_warn(adapter, drv, adapter->netdev,
695 					   "unknown tx timestamp capture cause\n");
696 			}
697 		} else {
698 			netif_warn(adapter, drv, adapter->netdev,
699 				   "TX TS INT but no TX TS CNT\n");
700 		}
701 		lan743x_csr_write(adapter, PTP_INT_STS, PTP_INT_BIT_TX_TS_);
702 	}
703 
704 	if (new_timestamp_available)
705 		lan743x_ptp_tx_ts_complete(adapter);
706 
707 	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
708 
709 	return -1;
710 }
711 
712 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
713 				  u32 *seconds, u32 *nano_seconds,
714 				  u32 *sub_nano_seconds)
715 {
716 	struct lan743x_ptp *ptp = &adapter->ptp;
717 
718 	mutex_lock(&ptp->command_lock);
719 
720 	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
721 	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
722 
723 	if (seconds)
724 		(*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC);
725 
726 	if (nano_seconds)
727 		(*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS);
728 
729 	if (sub_nano_seconds)
730 		(*sub_nano_seconds) =
731 		lan743x_csr_read(adapter, PTP_CLOCK_SUBNS);
732 
733 	mutex_unlock(&ptp->command_lock);
734 }
735 
736 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
737 				   s64 time_step_ns)
738 {
739 	struct lan743x_ptp *ptp = &adapter->ptp;
740 	u32 nano_seconds_step = 0;
741 	u64 abs_time_step_ns = 0;
742 	u32 unsigned_seconds = 0;
743 	u32 nano_seconds = 0;
744 	u32 remainder = 0;
745 	s32 seconds = 0;
746 
747 	if (time_step_ns >  15000000000LL) {
748 		/* convert to clock set */
749 		lan743x_ptp_clock_get(adapter, &unsigned_seconds,
750 				      &nano_seconds, NULL);
751 		unsigned_seconds += div_u64_rem(time_step_ns, 1000000000LL,
752 						&remainder);
753 		nano_seconds += remainder;
754 		if (nano_seconds >= 1000000000) {
755 			unsigned_seconds++;
756 			nano_seconds -= 1000000000;
757 		}
758 		lan743x_ptp_clock_set(adapter, unsigned_seconds,
759 				      nano_seconds, 0);
760 		return;
761 	} else if (time_step_ns < -15000000000LL) {
762 		/* convert to clock set */
763 		time_step_ns = -time_step_ns;
764 
765 		lan743x_ptp_clock_get(adapter, &unsigned_seconds,
766 				      &nano_seconds, NULL);
767 		unsigned_seconds -= div_u64_rem(time_step_ns, 1000000000LL,
768 						&remainder);
769 		nano_seconds_step = remainder;
770 		if (nano_seconds < nano_seconds_step) {
771 			unsigned_seconds--;
772 			nano_seconds += 1000000000;
773 		}
774 		nano_seconds -= nano_seconds_step;
775 		lan743x_ptp_clock_set(adapter, unsigned_seconds,
776 				      nano_seconds, 0);
777 		return;
778 	}
779 
780 	/* do clock step */
781 	if (time_step_ns >= 0) {
782 		abs_time_step_ns = (u64)(time_step_ns);
783 		seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000,
784 					   &remainder);
785 		nano_seconds = (u32)remainder;
786 	} else {
787 		abs_time_step_ns = (u64)(-time_step_ns);
788 		seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000,
789 					     &remainder));
790 		nano_seconds = (u32)remainder;
791 		if (nano_seconds > 0) {
792 			/* subtracting nano seconds is not allowed
793 			 * convert to subtracting from seconds,
794 			 * and adding to nanoseconds
795 			 */
796 			seconds--;
797 			nano_seconds = (1000000000 - nano_seconds);
798 		}
799 	}
800 
801 	if (nano_seconds > 0) {
802 		/* add 8 ns to cover the likely normal increment */
803 		nano_seconds += 8;
804 	}
805 
806 	if (nano_seconds >= 1000000000) {
807 		/* carry into seconds */
808 		seconds++;
809 		nano_seconds -= 1000000000;
810 	}
811 
812 	while (seconds) {
813 		mutex_lock(&ptp->command_lock);
814 		if (seconds > 0) {
815 			u32 adjustment_value = (u32)seconds;
816 
817 			if (adjustment_value > 0xF)
818 				adjustment_value = 0xF;
819 			lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
820 					  PTP_CLOCK_STEP_ADJ_DIR_ |
821 					  adjustment_value);
822 			seconds -= ((s32)adjustment_value);
823 		} else {
824 			u32 adjustment_value = (u32)(-seconds);
825 
826 			if (adjustment_value > 0xF)
827 				adjustment_value = 0xF;
828 			lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
829 					  adjustment_value);
830 			seconds += ((s32)adjustment_value);
831 		}
832 		lan743x_csr_write(adapter, PTP_CMD_CTL,
833 				  PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
834 		lan743x_ptp_wait_till_cmd_done(adapter,
835 					       PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
836 		mutex_unlock(&ptp->command_lock);
837 	}
838 	if (nano_seconds) {
839 		mutex_lock(&ptp->command_lock);
840 		lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
841 				  PTP_CLOCK_STEP_ADJ_DIR_ |
842 				  (nano_seconds &
843 				  PTP_CLOCK_STEP_ADJ_VALUE_MASK_));
844 		lan743x_csr_write(adapter, PTP_CMD_CTL,
845 				  PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
846 		lan743x_ptp_wait_till_cmd_done(adapter,
847 					       PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
848 		mutex_unlock(&ptp->command_lock);
849 	}
850 }
851 
852 void lan743x_ptp_isr(void *context)
853 {
854 	struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
855 	struct lan743x_ptp *ptp = NULL;
856 	int enable_flag = 1;
857 	u32 ptp_int_sts = 0;
858 
859 	ptp = &adapter->ptp;
860 
861 	lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
862 
863 	ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
864 	ptp_int_sts &= lan743x_csr_read(adapter, PTP_INT_EN_SET);
865 
866 	if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
867 		ptp_schedule_worker(ptp->ptp_clock, 0);
868 		enable_flag = 0;/* tasklet will re-enable later */
869 	}
870 	if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) {
871 		netif_err(adapter, drv, adapter->netdev,
872 			  "PTP TX Software Timestamp Error\n");
873 		/* clear int status bit */
874 		lan743x_csr_write(adapter, PTP_INT_STS,
875 				  PTP_INT_BIT_TX_SWTS_ERR_);
876 	}
877 	if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) {
878 		/* clear int status bit */
879 		lan743x_csr_write(adapter, PTP_INT_STS,
880 				  PTP_INT_BIT_TIMER_B_);
881 	}
882 	if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) {
883 		/* clear int status bit */
884 		lan743x_csr_write(adapter, PTP_INT_STS,
885 				  PTP_INT_BIT_TIMER_A_);
886 	}
887 
888 	if (enable_flag) {
889 		/* re-enable isr */
890 		lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
891 	}
892 }
893 
894 static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter,
895 					  struct sk_buff *skb, bool ignore_sync)
896 {
897 	struct lan743x_ptp *ptp = &adapter->ptp;
898 
899 	spin_lock_bh(&ptp->tx_ts_lock);
900 	if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
901 		ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb;
902 		if (ignore_sync)
903 			ptp->tx_ts_ignore_sync_queue |=
904 				BIT(ptp->tx_ts_skb_queue_size);
905 		ptp->tx_ts_skb_queue_size++;
906 	} else {
907 		/* this should never happen, so long as the tx channel
908 		 * calls and honors the result from
909 		 * lan743x_ptp_request_tx_timestamp
910 		 */
911 		netif_err(adapter, drv, adapter->netdev,
912 			  "tx ts skb queue overflow\n");
913 		dev_kfree_skb(skb);
914 	}
915 	spin_unlock_bh(&ptp->tx_ts_lock);
916 }
917 
918 static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter)
919 {
920 	struct timespec64 ts;
921 
922 	ktime_get_clocktai_ts64(&ts);
923 
924 	lan743x_ptp_clock_set(adapter, ts.tv_sec, ts.tv_nsec, 0);
925 }
926 
927 void lan743x_ptp_update_latency(struct lan743x_adapter *adapter,
928 				u32 link_speed)
929 {
930 	switch (link_speed) {
931 	case 10:
932 		lan743x_csr_write(adapter, PTP_LATENCY,
933 				  PTP_LATENCY_TX_SET_(0) |
934 				  PTP_LATENCY_RX_SET_(0));
935 		break;
936 	case 100:
937 		lan743x_csr_write(adapter, PTP_LATENCY,
938 				  PTP_LATENCY_TX_SET_(181) |
939 				  PTP_LATENCY_RX_SET_(594));
940 		break;
941 	case 1000:
942 		lan743x_csr_write(adapter, PTP_LATENCY,
943 				  PTP_LATENCY_TX_SET_(30) |
944 				  PTP_LATENCY_RX_SET_(525));
945 		break;
946 	}
947 }
948 
949 int lan743x_ptp_init(struct lan743x_adapter *adapter)
950 {
951 	struct lan743x_ptp *ptp = &adapter->ptp;
952 	int i;
953 
954 	mutex_init(&ptp->command_lock);
955 	spin_lock_init(&ptp->tx_ts_lock);
956 	ptp->used_event_ch = 0;
957 
958 	for (i = 0; i < LAN743X_PTP_N_EVENT_CHAN; i++) {
959 		ptp->perout[i].event_ch = -1;
960 		ptp->perout[i].gpio_pin = -1;
961 	}
962 
963 	lan743x_led_mux_save(adapter);
964 
965 	return 0;
966 }
967 
968 int lan743x_ptp_open(struct lan743x_adapter *adapter)
969 {
970 	struct lan743x_ptp *ptp = &adapter->ptp;
971 	int ret = -ENODEV;
972 	u32 temp;
973 	int i;
974 	int n_pins;
975 
976 	lan743x_ptp_reset(adapter);
977 	lan743x_ptp_sync_to_system_clock(adapter);
978 	temp = lan743x_csr_read(adapter, PTP_TX_MOD2);
979 	temp |= PTP_TX_MOD2_TX_PTP_CLR_UDPV4_CHKSUM_;
980 	lan743x_csr_write(adapter, PTP_TX_MOD2, temp);
981 	lan743x_ptp_enable(adapter);
982 	lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
983 	lan743x_csr_write(adapter, PTP_INT_EN_SET,
984 			  PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_);
985 	ptp->flags |= PTP_FLAG_ISR_ENABLED;
986 
987 	if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK))
988 		return 0;
989 
990 	switch (adapter->csr.id_rev & ID_REV_ID_MASK_) {
991 	case ID_REV_ID_LAN7430_:
992 		n_pins = LAN7430_N_GPIO;
993 		break;
994 	case ID_REV_ID_LAN7431_:
995 		n_pins = LAN7431_N_GPIO;
996 		break;
997 	default:
998 		netif_warn(adapter, drv, adapter->netdev,
999 			   "Unknown LAN743x (%08x). Assuming no GPIO\n",
1000 			   adapter->csr.id_rev);
1001 		n_pins = 0;
1002 		break;
1003 	}
1004 
1005 	if (n_pins > LAN743X_PTP_N_GPIO)
1006 		n_pins = LAN743X_PTP_N_GPIO;
1007 
1008 	for (i = 0; i < n_pins; i++) {
1009 		struct ptp_pin_desc *ptp_pin = &ptp->pin_config[i];
1010 
1011 		snprintf(ptp_pin->name,
1012 			 sizeof(ptp_pin->name), "lan743x_ptp_pin_%02d", i);
1013 		ptp_pin->index = i;
1014 		ptp_pin->func = PTP_PF_NONE;
1015 	}
1016 
1017 	ptp->ptp_clock_info.owner = THIS_MODULE;
1018 	snprintf(ptp->ptp_clock_info.name, 16, "%pm",
1019 		 adapter->netdev->dev_addr);
1020 	ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB;
1021 	ptp->ptp_clock_info.n_alarm = 0;
1022 	ptp->ptp_clock_info.n_ext_ts = 0;
1023 	ptp->ptp_clock_info.n_per_out = LAN743X_PTP_N_EVENT_CHAN;
1024 	ptp->ptp_clock_info.n_pins = n_pins;
1025 	ptp->ptp_clock_info.pps = 0;
1026 	ptp->ptp_clock_info.pin_config = ptp->pin_config;
1027 	ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine;
1028 	ptp->ptp_clock_info.adjfreq = lan743x_ptpci_adjfreq;
1029 	ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime;
1030 	ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64;
1031 	ptp->ptp_clock_info.getcrosststamp = NULL;
1032 	ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64;
1033 	ptp->ptp_clock_info.enable = lan743x_ptpci_enable;
1034 	ptp->ptp_clock_info.do_aux_work = lan743x_ptpci_do_aux_work;
1035 	ptp->ptp_clock_info.verify = lan743x_ptpci_verify_pin_config;
1036 
1037 	ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info,
1038 					    &adapter->pdev->dev);
1039 
1040 	if (IS_ERR(ptp->ptp_clock)) {
1041 		netif_err(adapter, ifup, adapter->netdev,
1042 			  "ptp_clock_register failed\n");
1043 		goto done;
1044 	}
1045 	ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED;
1046 	netif_info(adapter, ifup, adapter->netdev,
1047 		   "successfully registered ptp clock\n");
1048 
1049 	return 0;
1050 done:
1051 	lan743x_ptp_close(adapter);
1052 	return ret;
1053 }
1054 
1055 void lan743x_ptp_close(struct lan743x_adapter *adapter)
1056 {
1057 	struct lan743x_ptp *ptp = &adapter->ptp;
1058 	int index;
1059 
1060 	if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) &&
1061 	    (ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED)) {
1062 		ptp_clock_unregister(ptp->ptp_clock);
1063 		ptp->ptp_clock = NULL;
1064 		ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED;
1065 		netif_info(adapter, drv, adapter->netdev,
1066 			   "ptp clock unregister\n");
1067 	}
1068 
1069 	if (ptp->flags & PTP_FLAG_ISR_ENABLED) {
1070 		lan743x_csr_write(adapter, PTP_INT_EN_CLR,
1071 				  PTP_INT_BIT_TX_SWTS_ERR_ |
1072 				  PTP_INT_BIT_TX_TS_);
1073 		lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
1074 		ptp->flags &= ~PTP_FLAG_ISR_ENABLED;
1075 	}
1076 
1077 	/* clean up pending timestamp requests */
1078 	lan743x_ptp_tx_ts_complete(adapter);
1079 	spin_lock_bh(&ptp->tx_ts_lock);
1080 	for (index = 0;
1081 		index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS;
1082 		index++) {
1083 		struct sk_buff *skb = ptp->tx_ts_skb_queue[index];
1084 
1085 		dev_kfree_skb(skb);
1086 		ptp->tx_ts_skb_queue[index] = NULL;
1087 		ptp->tx_ts_seconds_queue[index] = 0;
1088 		ptp->tx_ts_nseconds_queue[index] = 0;
1089 	}
1090 	ptp->tx_ts_skb_queue_size = 0;
1091 	ptp->tx_ts_queue_size = 0;
1092 	ptp->pending_tx_timestamps = 0;
1093 	spin_unlock_bh(&ptp->tx_ts_lock);
1094 
1095 	lan743x_led_mux_restore(adapter);
1096 
1097 	lan743x_ptp_disable(adapter);
1098 }
1099 
1100 static void lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter *adapter,
1101 					   bool ts_insert_enable)
1102 {
1103 	u32 ptp_tx_mod = lan743x_csr_read(adapter, PTP_TX_MOD);
1104 
1105 	if (ts_insert_enable)
1106 		ptp_tx_mod |= PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1107 	else
1108 		ptp_tx_mod &= ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1109 
1110 	lan743x_csr_write(adapter, PTP_TX_MOD, ptp_tx_mod);
1111 }
1112 
1113 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter)
1114 {
1115 	if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_)
1116 		return true;
1117 	return false;
1118 }
1119 
1120 static void lan743x_ptp_enable(struct lan743x_adapter *adapter)
1121 {
1122 	struct lan743x_ptp *ptp = &adapter->ptp;
1123 
1124 	mutex_lock(&ptp->command_lock);
1125 
1126 	if (lan743x_ptp_is_enabled(adapter)) {
1127 		netif_warn(adapter, drv, adapter->netdev,
1128 			   "PTP already enabled\n");
1129 		goto done;
1130 	}
1131 	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_);
1132 done:
1133 	mutex_unlock(&ptp->command_lock);
1134 }
1135 
1136 static void lan743x_ptp_disable(struct lan743x_adapter *adapter)
1137 {
1138 	struct lan743x_ptp *ptp = &adapter->ptp;
1139 
1140 	mutex_lock(&ptp->command_lock);
1141 	if (!lan743x_ptp_is_enabled(adapter)) {
1142 		netif_warn(adapter, drv, adapter->netdev,
1143 			   "PTP already disabled\n");
1144 		goto done;
1145 	}
1146 	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_DISABLE_);
1147 	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_);
1148 done:
1149 	mutex_unlock(&ptp->command_lock);
1150 }
1151 
1152 static void lan743x_ptp_reset(struct lan743x_adapter *adapter)
1153 {
1154 	struct lan743x_ptp *ptp = &adapter->ptp;
1155 
1156 	mutex_lock(&ptp->command_lock);
1157 
1158 	if (lan743x_ptp_is_enabled(adapter)) {
1159 		netif_err(adapter, drv, adapter->netdev,
1160 			  "Attempting reset while enabled\n");
1161 		goto done;
1162 	}
1163 
1164 	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_RESET_);
1165 	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_);
1166 done:
1167 	mutex_unlock(&ptp->command_lock);
1168 }
1169 
1170 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
1171 				  u32 seconds, u32 nano_seconds,
1172 				  u32 sub_nano_seconds)
1173 {
1174 	struct lan743x_ptp *ptp = &adapter->ptp;
1175 
1176 	mutex_lock(&ptp->command_lock);
1177 
1178 	lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds);
1179 	lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds);
1180 	lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds);
1181 
1182 	lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1183 	lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1184 	mutex_unlock(&ptp->command_lock);
1185 }
1186 
1187 bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter)
1188 {
1189 	struct lan743x_ptp *ptp = &adapter->ptp;
1190 	bool result = false;
1191 
1192 	spin_lock_bh(&ptp->tx_ts_lock);
1193 	if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
1194 		/* request granted */
1195 		ptp->pending_tx_timestamps++;
1196 		result = true;
1197 	}
1198 	spin_unlock_bh(&ptp->tx_ts_lock);
1199 	return result;
1200 }
1201 
1202 void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter)
1203 {
1204 	struct lan743x_ptp *ptp = &adapter->ptp;
1205 
1206 	spin_lock_bh(&ptp->tx_ts_lock);
1207 	if (ptp->pending_tx_timestamps > 0)
1208 		ptp->pending_tx_timestamps--;
1209 	else
1210 		netif_err(adapter, drv, adapter->netdev,
1211 			  "unrequest failed, pending_tx_timestamps==0\n");
1212 	spin_unlock_bh(&ptp->tx_ts_lock);
1213 }
1214 
1215 void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
1216 				  struct sk_buff *skb, bool ignore_sync)
1217 {
1218 	lan743x_ptp_tx_ts_enqueue_skb(adapter, skb, ignore_sync);
1219 
1220 	lan743x_ptp_tx_ts_complete(adapter);
1221 }
1222 
1223 int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1224 {
1225 	struct lan743x_adapter *adapter = netdev_priv(netdev);
1226 	struct hwtstamp_config config;
1227 	int ret = 0;
1228 	int index;
1229 
1230 	if (!ifr) {
1231 		netif_err(adapter, drv, adapter->netdev,
1232 			  "SIOCSHWTSTAMP, ifr == NULL\n");
1233 		return -EINVAL;
1234 	}
1235 
1236 	if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1237 		return -EFAULT;
1238 
1239 	if (config.flags) {
1240 		netif_warn(adapter, drv, adapter->netdev,
1241 			   "ignoring hwtstamp_config.flags == 0x%08X, expected 0\n",
1242 			   config.flags);
1243 	}
1244 
1245 	switch (config.tx_type) {
1246 	case HWTSTAMP_TX_OFF:
1247 		for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1248 			index++)
1249 			lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1250 							 false, false);
1251 		lan743x_ptp_set_sync_ts_insert(adapter, false);
1252 		break;
1253 	case HWTSTAMP_TX_ON:
1254 		for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1255 			index++)
1256 			lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1257 							 true, false);
1258 		lan743x_ptp_set_sync_ts_insert(adapter, false);
1259 		break;
1260 	case HWTSTAMP_TX_ONESTEP_SYNC:
1261 		for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1262 			index++)
1263 			lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1264 							 true, true);
1265 
1266 		lan743x_ptp_set_sync_ts_insert(adapter, true);
1267 		break;
1268 	case HWTSTAMP_TX_ONESTEP_P2P:
1269 		ret = -ERANGE;
1270 		break;
1271 	default:
1272 		netif_warn(adapter, drv, adapter->netdev,
1273 			   "  tx_type = %d, UNKNOWN\n", config.tx_type);
1274 		ret = -EINVAL;
1275 		break;
1276 	}
1277 
1278 	if (!ret)
1279 		return copy_to_user(ifr->ifr_data, &config,
1280 			sizeof(config)) ? -EFAULT : 0;
1281 	return ret;
1282 }
1283