1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /* Copyright (C) 2018 Microchip Technology Inc. */
3
4 #include <linux/netdevice.h>
5 #include "lan743x_main.h"
6
7 #include <linux/ptp_clock_kernel.h>
8 #include <linux/module.h>
9 #include <linux/pci.h>
10 #include <linux/net_tstamp.h>
11
12 #include "lan743x_ptp.h"
13
14 #define LAN743X_NUMBER_OF_GPIO (12)
15 #define LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB (31249999)
16 #define LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM (2047999934)
17
18 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter);
19 static void lan743x_ptp_enable(struct lan743x_adapter *adapter);
20 static void lan743x_ptp_disable(struct lan743x_adapter *adapter);
21 static void lan743x_ptp_reset(struct lan743x_adapter *adapter);
22 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
23 u32 seconds, u32 nano_seconds,
24 u32 sub_nano_seconds);
25
lan743x_gpio_init(struct lan743x_adapter * adapter)26 int lan743x_gpio_init(struct lan743x_adapter *adapter)
27 {
28 struct lan743x_gpio *gpio = &adapter->gpio;
29
30 spin_lock_init(&gpio->gpio_lock);
31
32 gpio->gpio_cfg0 = 0; /* set all direction to input, data = 0 */
33 gpio->gpio_cfg1 = 0x0FFF0000;/* disable all gpio, set to open drain */
34 gpio->gpio_cfg2 = 0;/* set all to 1588 low polarity level */
35 gpio->gpio_cfg3 = 0;/* disable all 1588 output */
36 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
37 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
38 lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
39 lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
40
41 return 0;
42 }
43
lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter * adapter,u32 bit_mask)44 static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter,
45 u32 bit_mask)
46 {
47 int timeout = 1000;
48 u32 data = 0;
49
50 while (timeout &&
51 (data = (lan743x_csr_read(adapter, PTP_CMD_CTL) &
52 bit_mask))) {
53 usleep_range(1000, 20000);
54 timeout--;
55 }
56 if (data) {
57 netif_err(adapter, drv, adapter->netdev,
58 "timeout waiting for cmd to be done, cmd = 0x%08X\n",
59 bit_mask);
60 }
61 }
62
lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter * adapter,u32 seconds,u32 nano_seconds,u32 header)63 static void lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter *adapter,
64 u32 seconds, u32 nano_seconds,
65 u32 header)
66 {
67 struct lan743x_ptp *ptp = &adapter->ptp;
68
69 spin_lock_bh(&ptp->tx_ts_lock);
70 if (ptp->tx_ts_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
71 ptp->tx_ts_seconds_queue[ptp->tx_ts_queue_size] = seconds;
72 ptp->tx_ts_nseconds_queue[ptp->tx_ts_queue_size] = nano_seconds;
73 ptp->tx_ts_header_queue[ptp->tx_ts_queue_size] = header;
74 ptp->tx_ts_queue_size++;
75 } else {
76 netif_err(adapter, drv, adapter->netdev,
77 "tx ts queue overflow\n");
78 }
79 spin_unlock_bh(&ptp->tx_ts_lock);
80 }
81
lan743x_ptp_tx_ts_complete(struct lan743x_adapter * adapter)82 static void lan743x_ptp_tx_ts_complete(struct lan743x_adapter *adapter)
83 {
84 struct lan743x_ptp *ptp = &adapter->ptp;
85 struct skb_shared_hwtstamps tstamps;
86 u32 header, nseconds, seconds;
87 bool ignore_sync = false;
88 struct sk_buff *skb;
89 int c, i;
90
91 spin_lock_bh(&ptp->tx_ts_lock);
92 c = ptp->tx_ts_skb_queue_size;
93
94 if (c > ptp->tx_ts_queue_size)
95 c = ptp->tx_ts_queue_size;
96 if (c <= 0)
97 goto done;
98
99 for (i = 0; i < c; i++) {
100 ignore_sync = ((ptp->tx_ts_ignore_sync_queue &
101 BIT(i)) != 0);
102 skb = ptp->tx_ts_skb_queue[i];
103 nseconds = ptp->tx_ts_nseconds_queue[i];
104 seconds = ptp->tx_ts_seconds_queue[i];
105 header = ptp->tx_ts_header_queue[i];
106
107 memset(&tstamps, 0, sizeof(tstamps));
108 tstamps.hwtstamp = ktime_set(seconds, nseconds);
109 if (!ignore_sync ||
110 ((header & PTP_TX_MSG_HEADER_MSG_TYPE_) !=
111 PTP_TX_MSG_HEADER_MSG_TYPE_SYNC_))
112 skb_tstamp_tx(skb, &tstamps);
113
114 dev_kfree_skb(skb);
115
116 ptp->tx_ts_skb_queue[i] = NULL;
117 ptp->tx_ts_seconds_queue[i] = 0;
118 ptp->tx_ts_nseconds_queue[i] = 0;
119 ptp->tx_ts_header_queue[i] = 0;
120 }
121
122 /* shift queue */
123 ptp->tx_ts_ignore_sync_queue >>= c;
124 for (i = c; i < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; i++) {
125 ptp->tx_ts_skb_queue[i - c] = ptp->tx_ts_skb_queue[i];
126 ptp->tx_ts_seconds_queue[i - c] = ptp->tx_ts_seconds_queue[i];
127 ptp->tx_ts_nseconds_queue[i - c] = ptp->tx_ts_nseconds_queue[i];
128 ptp->tx_ts_header_queue[i - c] = ptp->tx_ts_header_queue[i];
129
130 ptp->tx_ts_skb_queue[i] = NULL;
131 ptp->tx_ts_seconds_queue[i] = 0;
132 ptp->tx_ts_nseconds_queue[i] = 0;
133 ptp->tx_ts_header_queue[i] = 0;
134 }
135 ptp->tx_ts_skb_queue_size -= c;
136 ptp->tx_ts_queue_size -= c;
137 done:
138 ptp->pending_tx_timestamps -= c;
139 spin_unlock_bh(&ptp->tx_ts_lock);
140 }
141
lan743x_ptp_reserve_event_ch(struct lan743x_adapter * adapter)142 static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter)
143 {
144 struct lan743x_ptp *ptp = &adapter->ptp;
145 int result = -ENODEV;
146 int index = 0;
147
148 mutex_lock(&ptp->command_lock);
149 for (index = 0; index < LAN743X_PTP_NUMBER_OF_EVENT_CHANNELS; index++) {
150 if (!(test_bit(index, &ptp->used_event_ch))) {
151 ptp->used_event_ch |= BIT(index);
152 result = index;
153 break;
154 }
155 }
156 mutex_unlock(&ptp->command_lock);
157 return result;
158 }
159
lan743x_ptp_release_event_ch(struct lan743x_adapter * adapter,int event_channel)160 static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter,
161 int event_channel)
162 {
163 struct lan743x_ptp *ptp = &adapter->ptp;
164
165 mutex_lock(&ptp->command_lock);
166 if (test_bit(event_channel, &ptp->used_event_ch)) {
167 ptp->used_event_ch &= ~BIT(event_channel);
168 } else {
169 netif_warn(adapter, drv, adapter->netdev,
170 "attempted release on a not used event_channel = %d\n",
171 event_channel);
172 }
173 mutex_unlock(&ptp->command_lock);
174 }
175
176 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
177 u32 *seconds, u32 *nano_seconds,
178 u32 *sub_nano_seconds);
179 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
180 s64 time_step_ns);
181
lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter * adapter,int bit,int ptp_channel)182 static int lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter *adapter,
183 int bit, int ptp_channel)
184 {
185 struct lan743x_gpio *gpio = &adapter->gpio;
186 unsigned long irq_flags = 0;
187 int bit_mask = BIT(bit);
188 int ret = -EBUSY;
189
190 spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
191
192 if (!(gpio->used_bits & bit_mask)) {
193 gpio->used_bits |= bit_mask;
194 gpio->output_bits |= bit_mask;
195 gpio->ptp_bits |= bit_mask;
196
197 /* set as output, and zero initial value */
198 gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_BIT_(bit);
199 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(bit);
200 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
201
202 /* enable gpio, and set buffer type to push pull */
203 gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOEN_BIT_(bit);
204 gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_BIT_(bit);
205 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
206
207 /* set 1588 polarity to high */
208 gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_BIT_(bit);
209 lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
210
211 if (!ptp_channel) {
212 /* use channel A */
213 gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_BIT_(bit);
214 } else {
215 /* use channel B */
216 gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_BIT_(bit);
217 }
218 gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_BIT_(bit);
219 lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
220
221 ret = bit;
222 }
223 spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
224 return ret;
225 }
226
lan743x_gpio_release(struct lan743x_adapter * adapter,int bit)227 static void lan743x_gpio_release(struct lan743x_adapter *adapter, int bit)
228 {
229 struct lan743x_gpio *gpio = &adapter->gpio;
230 unsigned long irq_flags = 0;
231 int bit_mask = BIT(bit);
232
233 spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
234 if (gpio->used_bits & bit_mask) {
235 gpio->used_bits &= ~bit_mask;
236 if (gpio->output_bits & bit_mask) {
237 gpio->output_bits &= ~bit_mask;
238
239 if (gpio->ptp_bits & bit_mask) {
240 gpio->ptp_bits &= ~bit_mask;
241 /* disable ptp output */
242 gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_OE_BIT_(bit);
243 lan743x_csr_write(adapter, GPIO_CFG3,
244 gpio->gpio_cfg3);
245 }
246 /* release gpio output */
247
248 /* disable gpio */
249 gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_BIT_(bit);
250 gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_BIT_(bit);
251 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
252
253 /* reset back to input */
254 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_BIT_(bit);
255 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(bit);
256 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
257 }
258 }
259 spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
260 }
261
lan743x_ptpci_adjfine(struct ptp_clock_info * ptpci,long scaled_ppm)262 static int lan743x_ptpci_adjfine(struct ptp_clock_info *ptpci, long scaled_ppm)
263 {
264 struct lan743x_ptp *ptp =
265 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
266 struct lan743x_adapter *adapter =
267 container_of(ptp, struct lan743x_adapter, ptp);
268 u32 lan743x_rate_adj = 0;
269 bool positive = true;
270 u64 u64_delta = 0;
271
272 if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) ||
273 scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) {
274 return -EINVAL;
275 }
276 if (scaled_ppm > 0) {
277 u64_delta = (u64)scaled_ppm;
278 positive = true;
279 } else {
280 u64_delta = (u64)(-scaled_ppm);
281 positive = false;
282 }
283 u64_delta = (u64_delta << 19);
284 lan743x_rate_adj = div_u64(u64_delta, 1000000);
285
286 if (positive)
287 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
288
289 lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
290 lan743x_rate_adj);
291
292 return 0;
293 }
294
lan743x_ptpci_adjfreq(struct ptp_clock_info * ptpci,s32 delta_ppb)295 static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb)
296 {
297 struct lan743x_ptp *ptp =
298 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
299 struct lan743x_adapter *adapter =
300 container_of(ptp, struct lan743x_adapter, ptp);
301 u32 lan743x_rate_adj = 0;
302 bool positive = true;
303 u32 u32_delta = 0;
304 u64 u64_delta = 0;
305
306 if ((delta_ppb < (-LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) ||
307 delta_ppb > LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB) {
308 return -EINVAL;
309 }
310 if (delta_ppb > 0) {
311 u32_delta = (u32)delta_ppb;
312 positive = true;
313 } else {
314 u32_delta = (u32)(-delta_ppb);
315 positive = false;
316 }
317 u64_delta = (((u64)u32_delta) << 35);
318 lan743x_rate_adj = div_u64(u64_delta, 1000000000);
319
320 if (positive)
321 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
322
323 lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
324 lan743x_rate_adj);
325
326 return 0;
327 }
328
lan743x_ptpci_adjtime(struct ptp_clock_info * ptpci,s64 delta)329 static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
330 {
331 struct lan743x_ptp *ptp =
332 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
333 struct lan743x_adapter *adapter =
334 container_of(ptp, struct lan743x_adapter, ptp);
335
336 lan743x_ptp_clock_step(adapter, delta);
337
338 return 0;
339 }
340
lan743x_ptpci_gettime64(struct ptp_clock_info * ptpci,struct timespec64 * ts)341 static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci,
342 struct timespec64 *ts)
343 {
344 struct lan743x_ptp *ptp =
345 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
346 struct lan743x_adapter *adapter =
347 container_of(ptp, struct lan743x_adapter, ptp);
348 u32 nano_seconds = 0;
349 u32 seconds = 0;
350
351 lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
352 ts->tv_sec = seconds;
353 ts->tv_nsec = nano_seconds;
354
355 return 0;
356 }
357
lan743x_ptpci_settime64(struct ptp_clock_info * ptpci,const struct timespec64 * ts)358 static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci,
359 const struct timespec64 *ts)
360 {
361 struct lan743x_ptp *ptp =
362 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
363 struct lan743x_adapter *adapter =
364 container_of(ptp, struct lan743x_adapter, ptp);
365 u32 nano_seconds = 0;
366 u32 seconds = 0;
367
368 if (ts) {
369 if (ts->tv_sec > 0xFFFFFFFFLL ||
370 ts->tv_sec < 0) {
371 netif_warn(adapter, drv, adapter->netdev,
372 "ts->tv_sec out of range, %lld\n",
373 ts->tv_sec);
374 return -ERANGE;
375 }
376 if (ts->tv_nsec >= 1000000000L ||
377 ts->tv_nsec < 0) {
378 netif_warn(adapter, drv, adapter->netdev,
379 "ts->tv_nsec out of range, %ld\n",
380 ts->tv_nsec);
381 return -ERANGE;
382 }
383 seconds = ts->tv_sec;
384 nano_seconds = ts->tv_nsec;
385 lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
386 } else {
387 netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n");
388 return -EINVAL;
389 }
390
391 return 0;
392 }
393
lan743x_ptp_perout_off(struct lan743x_adapter * adapter)394 static void lan743x_ptp_perout_off(struct lan743x_adapter *adapter)
395 {
396 struct lan743x_ptp *ptp = &adapter->ptp;
397 u32 general_config = 0;
398
399 if (ptp->perout_gpio_bit >= 0) {
400 lan743x_gpio_release(adapter, ptp->perout_gpio_bit);
401 ptp->perout_gpio_bit = -1;
402 }
403
404 if (ptp->perout_event_ch >= 0) {
405 /* set target to far in the future, effectively disabling it */
406 lan743x_csr_write(adapter,
407 PTP_CLOCK_TARGET_SEC_X(ptp->perout_event_ch),
408 0xFFFF0000);
409 lan743x_csr_write(adapter,
410 PTP_CLOCK_TARGET_NS_X(ptp->perout_event_ch),
411 0);
412
413 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
414 general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_
415 (ptp->perout_event_ch);
416 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
417 lan743x_ptp_release_event_ch(adapter, ptp->perout_event_ch);
418 ptp->perout_event_ch = -1;
419 }
420 }
421
lan743x_ptp_perout(struct lan743x_adapter * adapter,int on,struct ptp_perout_request * perout)422 static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on,
423 struct ptp_perout_request *perout)
424 {
425 struct lan743x_ptp *ptp = &adapter->ptp;
426 u32 period_sec = 0, period_nsec = 0;
427 u32 start_sec = 0, start_nsec = 0;
428 u32 general_config = 0;
429 int pulse_width = 0;
430 int perout_bit = 0;
431
432 /* Reject requests with unsupported flags */
433 if (perout->flags)
434 return -EOPNOTSUPP;
435
436 if (!on) {
437 lan743x_ptp_perout_off(adapter);
438 return 0;
439 }
440
441 if (ptp->perout_event_ch >= 0 ||
442 ptp->perout_gpio_bit >= 0) {
443 /* already on, turn off first */
444 lan743x_ptp_perout_off(adapter);
445 }
446
447 ptp->perout_event_ch = lan743x_ptp_reserve_event_ch(adapter);
448 if (ptp->perout_event_ch < 0) {
449 netif_warn(adapter, drv, adapter->netdev,
450 "Failed to reserve event channel for PEROUT\n");
451 goto failed;
452 }
453
454 switch (adapter->csr.id_rev & ID_REV_ID_MASK_) {
455 case ID_REV_ID_LAN7430_:
456 perout_bit = 2;/* GPIO 2 is preferred on EVB LAN7430 */
457 break;
458 case ID_REV_ID_LAN7431_:
459 perout_bit = 4;/* GPIO 4 is preferred on EVB LAN7431 */
460 break;
461 }
462
463 ptp->perout_gpio_bit = lan743x_gpio_rsrv_ptp_out(adapter,
464 perout_bit,
465 ptp->perout_event_ch);
466
467 if (ptp->perout_gpio_bit < 0) {
468 netif_warn(adapter, drv, adapter->netdev,
469 "Failed to reserve gpio %d for PEROUT\n",
470 perout_bit);
471 goto failed;
472 }
473
474 start_sec = perout->start.sec;
475 start_sec += perout->start.nsec / 1000000000;
476 start_nsec = perout->start.nsec % 1000000000;
477
478 period_sec = perout->period.sec;
479 period_sec += perout->period.nsec / 1000000000;
480 period_nsec = perout->period.nsec % 1000000000;
481
482 if (period_sec == 0) {
483 if (period_nsec >= 400000000) {
484 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
485 } else if (period_nsec >= 20000000) {
486 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
487 } else if (period_nsec >= 2000000) {
488 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
489 } else if (period_nsec >= 200000) {
490 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
491 } else if (period_nsec >= 20000) {
492 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
493 } else if (period_nsec >= 200) {
494 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
495 } else {
496 netif_warn(adapter, drv, adapter->netdev,
497 "perout period too small, minimum is 200nS\n");
498 goto failed;
499 }
500 } else {
501 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
502 }
503
504 /* turn off by setting target far in future */
505 lan743x_csr_write(adapter,
506 PTP_CLOCK_TARGET_SEC_X(ptp->perout_event_ch),
507 0xFFFF0000);
508 lan743x_csr_write(adapter,
509 PTP_CLOCK_TARGET_NS_X(ptp->perout_event_ch), 0);
510
511 /* Configure to pulse every period */
512 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
513 general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
514 (ptp->perout_event_ch));
515 general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
516 (ptp->perout_event_ch, pulse_width);
517 general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_
518 (ptp->perout_event_ch);
519 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
520
521 /* set the reload to one toggle cycle */
522 lan743x_csr_write(adapter,
523 PTP_CLOCK_TARGET_RELOAD_SEC_X(ptp->perout_event_ch),
524 period_sec);
525 lan743x_csr_write(adapter,
526 PTP_CLOCK_TARGET_RELOAD_NS_X(ptp->perout_event_ch),
527 period_nsec);
528
529 /* set the start time */
530 lan743x_csr_write(adapter,
531 PTP_CLOCK_TARGET_SEC_X(ptp->perout_event_ch),
532 start_sec);
533 lan743x_csr_write(adapter,
534 PTP_CLOCK_TARGET_NS_X(ptp->perout_event_ch),
535 start_nsec);
536
537 return 0;
538
539 failed:
540 lan743x_ptp_perout_off(adapter);
541 return -ENODEV;
542 }
543
lan743x_ptpci_enable(struct ptp_clock_info * ptpci,struct ptp_clock_request * request,int on)544 static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci,
545 struct ptp_clock_request *request, int on)
546 {
547 struct lan743x_ptp *ptp =
548 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
549 struct lan743x_adapter *adapter =
550 container_of(ptp, struct lan743x_adapter, ptp);
551
552 if (request) {
553 switch (request->type) {
554 case PTP_CLK_REQ_EXTTS:
555 return -EINVAL;
556 case PTP_CLK_REQ_PEROUT:
557 if (request->perout.index == 0)
558 return lan743x_ptp_perout(adapter, on,
559 &request->perout);
560 return -EINVAL;
561 case PTP_CLK_REQ_PPS:
562 return -EINVAL;
563 default:
564 netif_err(adapter, drv, adapter->netdev,
565 "request->type == %d, Unknown\n",
566 request->type);
567 break;
568 }
569 } else {
570 netif_err(adapter, drv, adapter->netdev, "request == NULL\n");
571 }
572 return 0;
573 }
574
lan743x_ptpci_do_aux_work(struct ptp_clock_info * ptpci)575 static long lan743x_ptpci_do_aux_work(struct ptp_clock_info *ptpci)
576 {
577 struct lan743x_ptp *ptp =
578 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
579 struct lan743x_adapter *adapter =
580 container_of(ptp, struct lan743x_adapter, ptp);
581 u32 cap_info, cause, header, nsec, seconds;
582 bool new_timestamp_available = false;
583 int count = 0;
584
585 while ((count < 100) &&
586 (lan743x_csr_read(adapter, PTP_INT_STS) & PTP_INT_BIT_TX_TS_)) {
587 count++;
588 cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO);
589
590 if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) {
591 seconds = lan743x_csr_read(adapter,
592 PTP_TX_EGRESS_SEC);
593 nsec = lan743x_csr_read(adapter, PTP_TX_EGRESS_NS);
594 cause = (nsec &
595 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_);
596 header = lan743x_csr_read(adapter,
597 PTP_TX_MSG_HEADER);
598
599 if (cause == PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) {
600 nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_;
601 lan743x_ptp_tx_ts_enqueue_ts(adapter,
602 seconds, nsec,
603 header);
604 new_timestamp_available = true;
605 } else if (cause ==
606 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) {
607 netif_err(adapter, drv, adapter->netdev,
608 "Auto capture cause not supported\n");
609 } else {
610 netif_warn(adapter, drv, adapter->netdev,
611 "unknown tx timestamp capture cause\n");
612 }
613 } else {
614 netif_warn(adapter, drv, adapter->netdev,
615 "TX TS INT but no TX TS CNT\n");
616 }
617 lan743x_csr_write(adapter, PTP_INT_STS, PTP_INT_BIT_TX_TS_);
618 }
619
620 if (new_timestamp_available)
621 lan743x_ptp_tx_ts_complete(adapter);
622
623 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
624
625 return -1;
626 }
627
lan743x_ptp_clock_get(struct lan743x_adapter * adapter,u32 * seconds,u32 * nano_seconds,u32 * sub_nano_seconds)628 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
629 u32 *seconds, u32 *nano_seconds,
630 u32 *sub_nano_seconds)
631 {
632 struct lan743x_ptp *ptp = &adapter->ptp;
633
634 mutex_lock(&ptp->command_lock);
635
636 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
637 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
638
639 if (seconds)
640 (*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC);
641
642 if (nano_seconds)
643 (*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS);
644
645 if (sub_nano_seconds)
646 (*sub_nano_seconds) =
647 lan743x_csr_read(adapter, PTP_CLOCK_SUBNS);
648
649 mutex_unlock(&ptp->command_lock);
650 }
651
lan743x_ptp_clock_step(struct lan743x_adapter * adapter,s64 time_step_ns)652 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
653 s64 time_step_ns)
654 {
655 struct lan743x_ptp *ptp = &adapter->ptp;
656 u32 nano_seconds_step = 0;
657 u64 abs_time_step_ns = 0;
658 u32 unsigned_seconds = 0;
659 u32 nano_seconds = 0;
660 u32 remainder = 0;
661 s32 seconds = 0;
662
663 if (time_step_ns > 15000000000LL) {
664 /* convert to clock set */
665 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
666 &nano_seconds, NULL);
667 unsigned_seconds += div_u64_rem(time_step_ns, 1000000000LL,
668 &remainder);
669 nano_seconds += remainder;
670 if (nano_seconds >= 1000000000) {
671 unsigned_seconds++;
672 nano_seconds -= 1000000000;
673 }
674 lan743x_ptp_clock_set(adapter, unsigned_seconds,
675 nano_seconds, 0);
676 return;
677 } else if (time_step_ns < -15000000000LL) {
678 /* convert to clock set */
679 time_step_ns = -time_step_ns;
680
681 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
682 &nano_seconds, NULL);
683 unsigned_seconds -= div_u64_rem(time_step_ns, 1000000000LL,
684 &remainder);
685 nano_seconds_step = remainder;
686 if (nano_seconds < nano_seconds_step) {
687 unsigned_seconds--;
688 nano_seconds += 1000000000;
689 }
690 nano_seconds -= nano_seconds_step;
691 lan743x_ptp_clock_set(adapter, unsigned_seconds,
692 nano_seconds, 0);
693 return;
694 }
695
696 /* do clock step */
697 if (time_step_ns >= 0) {
698 abs_time_step_ns = (u64)(time_step_ns);
699 seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000,
700 &remainder);
701 nano_seconds = (u32)remainder;
702 } else {
703 abs_time_step_ns = (u64)(-time_step_ns);
704 seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000,
705 &remainder));
706 nano_seconds = (u32)remainder;
707 if (nano_seconds > 0) {
708 /* subtracting nano seconds is not allowed
709 * convert to subtracting from seconds,
710 * and adding to nanoseconds
711 */
712 seconds--;
713 nano_seconds = (1000000000 - nano_seconds);
714 }
715 }
716
717 if (nano_seconds > 0) {
718 /* add 8 ns to cover the likely normal increment */
719 nano_seconds += 8;
720 }
721
722 if (nano_seconds >= 1000000000) {
723 /* carry into seconds */
724 seconds++;
725 nano_seconds -= 1000000000;
726 }
727
728 while (seconds) {
729 mutex_lock(&ptp->command_lock);
730 if (seconds > 0) {
731 u32 adjustment_value = (u32)seconds;
732
733 if (adjustment_value > 0xF)
734 adjustment_value = 0xF;
735 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
736 PTP_CLOCK_STEP_ADJ_DIR_ |
737 adjustment_value);
738 seconds -= ((s32)adjustment_value);
739 } else {
740 u32 adjustment_value = (u32)(-seconds);
741
742 if (adjustment_value > 0xF)
743 adjustment_value = 0xF;
744 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
745 adjustment_value);
746 seconds += ((s32)adjustment_value);
747 }
748 lan743x_csr_write(adapter, PTP_CMD_CTL,
749 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
750 lan743x_ptp_wait_till_cmd_done(adapter,
751 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
752 mutex_unlock(&ptp->command_lock);
753 }
754 if (nano_seconds) {
755 mutex_lock(&ptp->command_lock);
756 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
757 PTP_CLOCK_STEP_ADJ_DIR_ |
758 (nano_seconds &
759 PTP_CLOCK_STEP_ADJ_VALUE_MASK_));
760 lan743x_csr_write(adapter, PTP_CMD_CTL,
761 PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
762 lan743x_ptp_wait_till_cmd_done(adapter,
763 PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
764 mutex_unlock(&ptp->command_lock);
765 }
766 }
767
lan743x_ptp_isr(void * context)768 void lan743x_ptp_isr(void *context)
769 {
770 struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
771 struct lan743x_ptp *ptp = NULL;
772 int enable_flag = 1;
773 u32 ptp_int_sts = 0;
774
775 ptp = &adapter->ptp;
776
777 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
778
779 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
780 ptp_int_sts &= lan743x_csr_read(adapter, PTP_INT_EN_SET);
781
782 if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
783 ptp_schedule_worker(ptp->ptp_clock, 0);
784 enable_flag = 0;/* tasklet will re-enable later */
785 }
786 if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) {
787 netif_err(adapter, drv, adapter->netdev,
788 "PTP TX Software Timestamp Error\n");
789 /* clear int status bit */
790 lan743x_csr_write(adapter, PTP_INT_STS,
791 PTP_INT_BIT_TX_SWTS_ERR_);
792 }
793 if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) {
794 /* clear int status bit */
795 lan743x_csr_write(adapter, PTP_INT_STS,
796 PTP_INT_BIT_TIMER_B_);
797 }
798 if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) {
799 /* clear int status bit */
800 lan743x_csr_write(adapter, PTP_INT_STS,
801 PTP_INT_BIT_TIMER_A_);
802 }
803
804 if (enable_flag) {
805 /* re-enable isr */
806 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
807 }
808 }
809
lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter * adapter,struct sk_buff * skb,bool ignore_sync)810 static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter,
811 struct sk_buff *skb, bool ignore_sync)
812 {
813 struct lan743x_ptp *ptp = &adapter->ptp;
814
815 spin_lock_bh(&ptp->tx_ts_lock);
816 if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
817 ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb;
818 if (ignore_sync)
819 ptp->tx_ts_ignore_sync_queue |=
820 BIT(ptp->tx_ts_skb_queue_size);
821 ptp->tx_ts_skb_queue_size++;
822 } else {
823 /* this should never happen, so long as the tx channel
824 * calls and honors the result from
825 * lan743x_ptp_request_tx_timestamp
826 */
827 netif_err(adapter, drv, adapter->netdev,
828 "tx ts skb queue overflow\n");
829 dev_kfree_skb(skb);
830 }
831 spin_unlock_bh(&ptp->tx_ts_lock);
832 }
833
lan743x_ptp_sync_to_system_clock(struct lan743x_adapter * adapter)834 static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter)
835 {
836 struct timespec64 ts;
837
838 ktime_get_clocktai_ts64(&ts);
839
840 lan743x_ptp_clock_set(adapter, ts.tv_sec, ts.tv_nsec, 0);
841 }
842
lan743x_ptp_update_latency(struct lan743x_adapter * adapter,u32 link_speed)843 void lan743x_ptp_update_latency(struct lan743x_adapter *adapter,
844 u32 link_speed)
845 {
846 switch (link_speed) {
847 case 10:
848 lan743x_csr_write(adapter, PTP_LATENCY,
849 PTP_LATENCY_TX_SET_(0) |
850 PTP_LATENCY_RX_SET_(0));
851 break;
852 case 100:
853 lan743x_csr_write(adapter, PTP_LATENCY,
854 PTP_LATENCY_TX_SET_(181) |
855 PTP_LATENCY_RX_SET_(594));
856 break;
857 case 1000:
858 lan743x_csr_write(adapter, PTP_LATENCY,
859 PTP_LATENCY_TX_SET_(30) |
860 PTP_LATENCY_RX_SET_(525));
861 break;
862 }
863 }
864
lan743x_ptp_init(struct lan743x_adapter * adapter)865 int lan743x_ptp_init(struct lan743x_adapter *adapter)
866 {
867 struct lan743x_ptp *ptp = &adapter->ptp;
868
869 mutex_init(&ptp->command_lock);
870 spin_lock_init(&ptp->tx_ts_lock);
871 ptp->used_event_ch = 0;
872 ptp->perout_event_ch = -1;
873 ptp->perout_gpio_bit = -1;
874 return 0;
875 }
876
lan743x_ptp_open(struct lan743x_adapter * adapter)877 int lan743x_ptp_open(struct lan743x_adapter *adapter)
878 {
879 struct lan743x_ptp *ptp = &adapter->ptp;
880 int ret = -ENODEV;
881 u32 temp;
882
883 lan743x_ptp_reset(adapter);
884 lan743x_ptp_sync_to_system_clock(adapter);
885 temp = lan743x_csr_read(adapter, PTP_TX_MOD2);
886 temp |= PTP_TX_MOD2_TX_PTP_CLR_UDPV4_CHKSUM_;
887 lan743x_csr_write(adapter, PTP_TX_MOD2, temp);
888 lan743x_ptp_enable(adapter);
889 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
890 lan743x_csr_write(adapter, PTP_INT_EN_SET,
891 PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_);
892 ptp->flags |= PTP_FLAG_ISR_ENABLED;
893
894 if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK))
895 return 0;
896
897 snprintf(ptp->pin_config[0].name, 32, "lan743x_ptp_pin_0");
898 ptp->pin_config[0].index = 0;
899 ptp->pin_config[0].func = PTP_PF_PEROUT;
900 ptp->pin_config[0].chan = 0;
901
902 ptp->ptp_clock_info.owner = THIS_MODULE;
903 snprintf(ptp->ptp_clock_info.name, 16, "%pm",
904 adapter->netdev->dev_addr);
905 ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB;
906 ptp->ptp_clock_info.n_alarm = 0;
907 ptp->ptp_clock_info.n_ext_ts = 0;
908 ptp->ptp_clock_info.n_per_out = 1;
909 ptp->ptp_clock_info.n_pins = 0;
910 ptp->ptp_clock_info.pps = 0;
911 ptp->ptp_clock_info.pin_config = NULL;
912 ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine;
913 ptp->ptp_clock_info.adjfreq = lan743x_ptpci_adjfreq;
914 ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime;
915 ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64;
916 ptp->ptp_clock_info.getcrosststamp = NULL;
917 ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64;
918 ptp->ptp_clock_info.enable = lan743x_ptpci_enable;
919 ptp->ptp_clock_info.do_aux_work = lan743x_ptpci_do_aux_work;
920 ptp->ptp_clock_info.verify = NULL;
921
922 ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info,
923 &adapter->pdev->dev);
924
925 if (IS_ERR(ptp->ptp_clock)) {
926 netif_err(adapter, ifup, adapter->netdev,
927 "ptp_clock_register failed\n");
928 goto done;
929 }
930 ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED;
931 netif_info(adapter, ifup, adapter->netdev,
932 "successfully registered ptp clock\n");
933
934 return 0;
935 done:
936 lan743x_ptp_close(adapter);
937 return ret;
938 }
939
lan743x_ptp_close(struct lan743x_adapter * adapter)940 void lan743x_ptp_close(struct lan743x_adapter *adapter)
941 {
942 struct lan743x_ptp *ptp = &adapter->ptp;
943 int index;
944
945 if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) &&
946 ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED) {
947 ptp_clock_unregister(ptp->ptp_clock);
948 ptp->ptp_clock = NULL;
949 ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED;
950 netif_info(adapter, drv, adapter->netdev,
951 "ptp clock unregister\n");
952 }
953
954 if (ptp->flags & PTP_FLAG_ISR_ENABLED) {
955 lan743x_csr_write(adapter, PTP_INT_EN_CLR,
956 PTP_INT_BIT_TX_SWTS_ERR_ |
957 PTP_INT_BIT_TX_TS_);
958 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
959 ptp->flags &= ~PTP_FLAG_ISR_ENABLED;
960 }
961
962 /* clean up pending timestamp requests */
963 lan743x_ptp_tx_ts_complete(adapter);
964 spin_lock_bh(&ptp->tx_ts_lock);
965 for (index = 0;
966 index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS;
967 index++) {
968 struct sk_buff *skb = ptp->tx_ts_skb_queue[index];
969
970 dev_kfree_skb(skb);
971 ptp->tx_ts_skb_queue[index] = NULL;
972 ptp->tx_ts_seconds_queue[index] = 0;
973 ptp->tx_ts_nseconds_queue[index] = 0;
974 }
975 ptp->tx_ts_skb_queue_size = 0;
976 ptp->tx_ts_queue_size = 0;
977 ptp->pending_tx_timestamps = 0;
978 spin_unlock_bh(&ptp->tx_ts_lock);
979
980 lan743x_ptp_disable(adapter);
981 }
982
lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter * adapter,bool ts_insert_enable)983 static void lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter *adapter,
984 bool ts_insert_enable)
985 {
986 u32 ptp_tx_mod = lan743x_csr_read(adapter, PTP_TX_MOD);
987
988 if (ts_insert_enable)
989 ptp_tx_mod |= PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
990 else
991 ptp_tx_mod &= ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
992
993 lan743x_csr_write(adapter, PTP_TX_MOD, ptp_tx_mod);
994 }
995
lan743x_ptp_is_enabled(struct lan743x_adapter * adapter)996 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter)
997 {
998 if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_)
999 return true;
1000 return false;
1001 }
1002
lan743x_ptp_enable(struct lan743x_adapter * adapter)1003 static void lan743x_ptp_enable(struct lan743x_adapter *adapter)
1004 {
1005 struct lan743x_ptp *ptp = &adapter->ptp;
1006
1007 mutex_lock(&ptp->command_lock);
1008
1009 if (lan743x_ptp_is_enabled(adapter)) {
1010 netif_warn(adapter, drv, adapter->netdev,
1011 "PTP already enabled\n");
1012 goto done;
1013 }
1014 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_);
1015 done:
1016 mutex_unlock(&ptp->command_lock);
1017 }
1018
lan743x_ptp_disable(struct lan743x_adapter * adapter)1019 static void lan743x_ptp_disable(struct lan743x_adapter *adapter)
1020 {
1021 struct lan743x_ptp *ptp = &adapter->ptp;
1022
1023 mutex_lock(&ptp->command_lock);
1024 if (!lan743x_ptp_is_enabled(adapter)) {
1025 netif_warn(adapter, drv, adapter->netdev,
1026 "PTP already disabled\n");
1027 goto done;
1028 }
1029 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_DISABLE_);
1030 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_);
1031 done:
1032 mutex_unlock(&ptp->command_lock);
1033 }
1034
lan743x_ptp_reset(struct lan743x_adapter * adapter)1035 static void lan743x_ptp_reset(struct lan743x_adapter *adapter)
1036 {
1037 struct lan743x_ptp *ptp = &adapter->ptp;
1038
1039 mutex_lock(&ptp->command_lock);
1040
1041 if (lan743x_ptp_is_enabled(adapter)) {
1042 netif_err(adapter, drv, adapter->netdev,
1043 "Attempting reset while enabled\n");
1044 goto done;
1045 }
1046
1047 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_RESET_);
1048 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_);
1049 done:
1050 mutex_unlock(&ptp->command_lock);
1051 }
1052
lan743x_ptp_clock_set(struct lan743x_adapter * adapter,u32 seconds,u32 nano_seconds,u32 sub_nano_seconds)1053 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
1054 u32 seconds, u32 nano_seconds,
1055 u32 sub_nano_seconds)
1056 {
1057 struct lan743x_ptp *ptp = &adapter->ptp;
1058
1059 mutex_lock(&ptp->command_lock);
1060
1061 lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds);
1062 lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds);
1063 lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds);
1064
1065 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1066 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1067 mutex_unlock(&ptp->command_lock);
1068 }
1069
lan743x_ptp_request_tx_timestamp(struct lan743x_adapter * adapter)1070 bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter)
1071 {
1072 struct lan743x_ptp *ptp = &adapter->ptp;
1073 bool result = false;
1074
1075 spin_lock_bh(&ptp->tx_ts_lock);
1076 if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
1077 /* request granted */
1078 ptp->pending_tx_timestamps++;
1079 result = true;
1080 }
1081 spin_unlock_bh(&ptp->tx_ts_lock);
1082 return result;
1083 }
1084
lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter * adapter)1085 void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter)
1086 {
1087 struct lan743x_ptp *ptp = &adapter->ptp;
1088
1089 spin_lock_bh(&ptp->tx_ts_lock);
1090 if (ptp->pending_tx_timestamps > 0)
1091 ptp->pending_tx_timestamps--;
1092 else
1093 netif_err(adapter, drv, adapter->netdev,
1094 "unrequest failed, pending_tx_timestamps==0\n");
1095 spin_unlock_bh(&ptp->tx_ts_lock);
1096 }
1097
lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter * adapter,struct sk_buff * skb,bool ignore_sync)1098 void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
1099 struct sk_buff *skb, bool ignore_sync)
1100 {
1101 lan743x_ptp_tx_ts_enqueue_skb(adapter, skb, ignore_sync);
1102
1103 lan743x_ptp_tx_ts_complete(adapter);
1104 }
1105
lan743x_ptp_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)1106 int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1107 {
1108 struct lan743x_adapter *adapter = netdev_priv(netdev);
1109 struct hwtstamp_config config;
1110 int ret = 0;
1111 int index;
1112
1113 if (!ifr) {
1114 netif_err(adapter, drv, adapter->netdev,
1115 "SIOCSHWTSTAMP, ifr == NULL\n");
1116 return -EINVAL;
1117 }
1118
1119 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1120 return -EFAULT;
1121
1122 if (config.flags) {
1123 netif_warn(adapter, drv, adapter->netdev,
1124 "ignoring hwtstamp_config.flags == 0x%08X, expected 0\n",
1125 config.flags);
1126 }
1127
1128 switch (config.tx_type) {
1129 case HWTSTAMP_TX_OFF:
1130 for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1131 index++)
1132 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1133 false, false);
1134 lan743x_ptp_set_sync_ts_insert(adapter, false);
1135 break;
1136 case HWTSTAMP_TX_ON:
1137 for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1138 index++)
1139 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1140 true, false);
1141 lan743x_ptp_set_sync_ts_insert(adapter, false);
1142 break;
1143 case HWTSTAMP_TX_ONESTEP_SYNC:
1144 for (index = 0; index < LAN743X_MAX_TX_CHANNELS;
1145 index++)
1146 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1147 true, true);
1148
1149 lan743x_ptp_set_sync_ts_insert(adapter, true);
1150 break;
1151 default:
1152 netif_warn(adapter, drv, adapter->netdev,
1153 " tx_type = %d, UNKNOWN\n", config.tx_type);
1154 ret = -EINVAL;
1155 break;
1156 }
1157
1158 if (!ret)
1159 return copy_to_user(ifr->ifr_data, &config,
1160 sizeof(config)) ? -EFAULT : 0;
1161 return ret;
1162 }
1163
