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
lan743x_get_channel(u32 ch_map)28 static int lan743x_get_channel(u32 ch_map)
29 {
30 int idx;
31
32 for (idx = 0; idx < 32; idx++) {
33 if (ch_map & (0x1 << idx))
34 return idx;
35 }
36
37 return -EINVAL;
38 }
39
lan743x_gpio_init(struct lan743x_adapter * adapter)40 int lan743x_gpio_init(struct lan743x_adapter *adapter)
41 {
42 struct lan743x_gpio *gpio = &adapter->gpio;
43
44 spin_lock_init(&gpio->gpio_lock);
45
46 gpio->gpio_cfg0 = 0; /* set all direction to input, data = 0 */
47 gpio->gpio_cfg1 = 0x0FFF0000;/* disable all gpio, set to open drain */
48 gpio->gpio_cfg2 = 0;/* set all to 1588 low polarity level */
49 gpio->gpio_cfg3 = 0;/* disable all 1588 output */
50 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
51 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
52 lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
53 lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
54
55 return 0;
56 }
57
lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter * adapter,u32 bit_mask)58 static void lan743x_ptp_wait_till_cmd_done(struct lan743x_adapter *adapter,
59 u32 bit_mask)
60 {
61 int timeout = 1000;
62 u32 data = 0;
63
64 while (timeout &&
65 (data = (lan743x_csr_read(adapter, PTP_CMD_CTL) &
66 bit_mask))) {
67 usleep_range(1000, 20000);
68 timeout--;
69 }
70 if (data) {
71 netif_err(adapter, drv, adapter->netdev,
72 "timeout waiting for cmd to be done, cmd = 0x%08X\n",
73 bit_mask);
74 }
75 }
76
lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter * adapter,u32 seconds,u32 nano_seconds,u32 header)77 static void lan743x_ptp_tx_ts_enqueue_ts(struct lan743x_adapter *adapter,
78 u32 seconds, u32 nano_seconds,
79 u32 header)
80 {
81 struct lan743x_ptp *ptp = &adapter->ptp;
82
83 spin_lock_bh(&ptp->tx_ts_lock);
84 if (ptp->tx_ts_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
85 ptp->tx_ts_seconds_queue[ptp->tx_ts_queue_size] = seconds;
86 ptp->tx_ts_nseconds_queue[ptp->tx_ts_queue_size] = nano_seconds;
87 ptp->tx_ts_header_queue[ptp->tx_ts_queue_size] = header;
88 ptp->tx_ts_queue_size++;
89 } else {
90 netif_err(adapter, drv, adapter->netdev,
91 "tx ts queue overflow\n");
92 }
93 spin_unlock_bh(&ptp->tx_ts_lock);
94 }
95
lan743x_ptp_tx_ts_complete(struct lan743x_adapter * adapter)96 static void lan743x_ptp_tx_ts_complete(struct lan743x_adapter *adapter)
97 {
98 struct lan743x_ptp *ptp = &adapter->ptp;
99 struct skb_shared_hwtstamps tstamps;
100 u32 header, nseconds, seconds;
101 bool ignore_sync = false;
102 struct sk_buff *skb;
103 int c, i;
104
105 spin_lock_bh(&ptp->tx_ts_lock);
106 c = ptp->tx_ts_skb_queue_size;
107
108 if (c > ptp->tx_ts_queue_size)
109 c = ptp->tx_ts_queue_size;
110 if (c <= 0)
111 goto done;
112
113 for (i = 0; i < c; i++) {
114 ignore_sync = ((ptp->tx_ts_ignore_sync_queue &
115 BIT(i)) != 0);
116 skb = ptp->tx_ts_skb_queue[i];
117 nseconds = ptp->tx_ts_nseconds_queue[i];
118 seconds = ptp->tx_ts_seconds_queue[i];
119 header = ptp->tx_ts_header_queue[i];
120
121 memset(&tstamps, 0, sizeof(tstamps));
122 tstamps.hwtstamp = ktime_set(seconds, nseconds);
123 if (!ignore_sync ||
124 ((header & PTP_TX_MSG_HEADER_MSG_TYPE_) !=
125 PTP_TX_MSG_HEADER_MSG_TYPE_SYNC_))
126 skb_tstamp_tx(skb, &tstamps);
127
128 dev_kfree_skb(skb);
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
136 /* shift queue */
137 ptp->tx_ts_ignore_sync_queue >>= c;
138 for (i = c; i < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS; i++) {
139 ptp->tx_ts_skb_queue[i - c] = ptp->tx_ts_skb_queue[i];
140 ptp->tx_ts_seconds_queue[i - c] = ptp->tx_ts_seconds_queue[i];
141 ptp->tx_ts_nseconds_queue[i - c] = ptp->tx_ts_nseconds_queue[i];
142 ptp->tx_ts_header_queue[i - c] = ptp->tx_ts_header_queue[i];
143
144 ptp->tx_ts_skb_queue[i] = NULL;
145 ptp->tx_ts_seconds_queue[i] = 0;
146 ptp->tx_ts_nseconds_queue[i] = 0;
147 ptp->tx_ts_header_queue[i] = 0;
148 }
149 ptp->tx_ts_skb_queue_size -= c;
150 ptp->tx_ts_queue_size -= c;
151 done:
152 ptp->pending_tx_timestamps -= c;
153 spin_unlock_bh(&ptp->tx_ts_lock);
154 }
155
lan743x_ptp_reserve_event_ch(struct lan743x_adapter * adapter,int event_channel)156 static int lan743x_ptp_reserve_event_ch(struct lan743x_adapter *adapter,
157 int event_channel)
158 {
159 struct lan743x_ptp *ptp = &adapter->ptp;
160 int result = -ENODEV;
161
162 mutex_lock(&ptp->command_lock);
163 if (!(test_bit(event_channel, &ptp->used_event_ch))) {
164 ptp->used_event_ch |= BIT(event_channel);
165 result = event_channel;
166 } else {
167 netif_warn(adapter, drv, adapter->netdev,
168 "attempted to reserved a used event_channel = %d\n",
169 event_channel);
170 }
171 mutex_unlock(&ptp->command_lock);
172 return result;
173 }
174
lan743x_ptp_release_event_ch(struct lan743x_adapter * adapter,int event_channel)175 static void lan743x_ptp_release_event_ch(struct lan743x_adapter *adapter,
176 int event_channel)
177 {
178 struct lan743x_ptp *ptp = &adapter->ptp;
179
180 mutex_lock(&ptp->command_lock);
181 if (test_bit(event_channel, &ptp->used_event_ch)) {
182 ptp->used_event_ch &= ~BIT(event_channel);
183 } else {
184 netif_warn(adapter, drv, adapter->netdev,
185 "attempted release on a not used event_channel = %d\n",
186 event_channel);
187 }
188 mutex_unlock(&ptp->command_lock);
189 }
190
191 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
192 u32 *seconds, u32 *nano_seconds,
193 u32 *sub_nano_seconds);
194 static void lan743x_ptp_io_clock_get(struct lan743x_adapter *adapter,
195 u32 *sec, u32 *nsec, u32 *sub_nsec);
196 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
197 s64 time_step_ns);
198
lan743x_led_mux_enable(struct lan743x_adapter * adapter,int pin,bool enable)199 static void lan743x_led_mux_enable(struct lan743x_adapter *adapter,
200 int pin, bool enable)
201 {
202 struct lan743x_ptp *ptp = &adapter->ptp;
203
204 if (ptp->leds_multiplexed &&
205 ptp->led_enabled[pin]) {
206 u32 val = lan743x_csr_read(adapter, HW_CFG);
207
208 if (enable)
209 val |= LAN743X_LED_ENABLE(pin);
210 else
211 val &= ~LAN743X_LED_ENABLE(pin);
212
213 lan743x_csr_write(adapter, HW_CFG, val);
214 }
215 }
216
lan743x_led_mux_save(struct lan743x_adapter * adapter)217 static void lan743x_led_mux_save(struct lan743x_adapter *adapter)
218 {
219 struct lan743x_ptp *ptp = &adapter->ptp;
220 u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
221
222 if (id_rev == ID_REV_ID_LAN7430_) {
223 int i;
224 u32 val = lan743x_csr_read(adapter, HW_CFG);
225
226 for (i = 0; i < LAN7430_N_LED; i++) {
227 bool led_enabled = (val & LAN743X_LED_ENABLE(i)) != 0;
228
229 ptp->led_enabled[i] = led_enabled;
230 }
231 ptp->leds_multiplexed = true;
232 } else {
233 ptp->leds_multiplexed = false;
234 }
235 }
236
lan743x_led_mux_restore(struct lan743x_adapter * adapter)237 static void lan743x_led_mux_restore(struct lan743x_adapter *adapter)
238 {
239 u32 id_rev = adapter->csr.id_rev & ID_REV_ID_MASK_;
240
241 if (id_rev == ID_REV_ID_LAN7430_) {
242 int i;
243
244 for (i = 0; i < LAN7430_N_LED; i++)
245 lan743x_led_mux_enable(adapter, i, true);
246 }
247 }
248
lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter * adapter,int pin,int event_channel)249 static int lan743x_gpio_rsrv_ptp_out(struct lan743x_adapter *adapter,
250 int pin, int event_channel)
251 {
252 struct lan743x_gpio *gpio = &adapter->gpio;
253 unsigned long irq_flags = 0;
254 int bit_mask = BIT(pin);
255 int ret = -EBUSY;
256
257 spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
258
259 if (!(gpio->used_bits & bit_mask)) {
260 gpio->used_bits |= bit_mask;
261 gpio->output_bits |= bit_mask;
262 gpio->ptp_bits |= bit_mask;
263
264 /* assign pin to GPIO function */
265 lan743x_led_mux_enable(adapter, pin, false);
266
267 /* set as output, and zero initial value */
268 gpio->gpio_cfg0 |= GPIO_CFG0_GPIO_DIR_BIT_(pin);
269 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
270 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
271
272 /* enable gpio, and set buffer type to push pull */
273 gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOEN_BIT_(pin);
274 gpio->gpio_cfg1 |= GPIO_CFG1_GPIOBUF_BIT_(pin);
275 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
276
277 /* set 1588 polarity to high */
278 gpio->gpio_cfg2 |= GPIO_CFG2_1588_POL_BIT_(pin);
279 lan743x_csr_write(adapter, GPIO_CFG2, gpio->gpio_cfg2);
280
281 if (event_channel == 0) {
282 /* use channel A */
283 gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_CH_SEL_BIT_(pin);
284 } else {
285 /* use channel B */
286 gpio->gpio_cfg3 |= GPIO_CFG3_1588_CH_SEL_BIT_(pin);
287 }
288 gpio->gpio_cfg3 |= GPIO_CFG3_1588_OE_BIT_(pin);
289 lan743x_csr_write(adapter, GPIO_CFG3, gpio->gpio_cfg3);
290
291 ret = pin;
292 }
293 spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
294 return ret;
295 }
296
lan743x_gpio_release(struct lan743x_adapter * adapter,int pin)297 static void lan743x_gpio_release(struct lan743x_adapter *adapter, int pin)
298 {
299 struct lan743x_gpio *gpio = &adapter->gpio;
300 unsigned long irq_flags = 0;
301 int bit_mask = BIT(pin);
302
303 spin_lock_irqsave(&gpio->gpio_lock, irq_flags);
304 if (gpio->used_bits & bit_mask) {
305 gpio->used_bits &= ~bit_mask;
306 if (gpio->output_bits & bit_mask) {
307 gpio->output_bits &= ~bit_mask;
308
309 if (gpio->ptp_bits & bit_mask) {
310 gpio->ptp_bits &= ~bit_mask;
311 /* disable ptp output */
312 gpio->gpio_cfg3 &= ~GPIO_CFG3_1588_OE_BIT_(pin);
313 lan743x_csr_write(adapter, GPIO_CFG3,
314 gpio->gpio_cfg3);
315 }
316 /* release gpio output */
317
318 /* disable gpio */
319 gpio->gpio_cfg1 |= GPIO_CFG1_GPIOEN_BIT_(pin);
320 gpio->gpio_cfg1 &= ~GPIO_CFG1_GPIOBUF_BIT_(pin);
321 lan743x_csr_write(adapter, GPIO_CFG1, gpio->gpio_cfg1);
322
323 /* reset back to input */
324 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DIR_BIT_(pin);
325 gpio->gpio_cfg0 &= ~GPIO_CFG0_GPIO_DATA_BIT_(pin);
326 lan743x_csr_write(adapter, GPIO_CFG0, gpio->gpio_cfg0);
327
328 /* assign pin to original function */
329 lan743x_led_mux_enable(adapter, pin, true);
330 }
331 }
332 spin_unlock_irqrestore(&gpio->gpio_lock, irq_flags);
333 }
334
lan743x_ptpci_adjfine(struct ptp_clock_info * ptpci,long scaled_ppm)335 static int lan743x_ptpci_adjfine(struct ptp_clock_info *ptpci, long scaled_ppm)
336 {
337 struct lan743x_ptp *ptp =
338 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
339 struct lan743x_adapter *adapter =
340 container_of(ptp, struct lan743x_adapter, ptp);
341 u32 lan743x_rate_adj = 0;
342 u64 u64_delta;
343
344 if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) ||
345 scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) {
346 return -EINVAL;
347 }
348
349 /* diff_by_scaled_ppm returns true if the difference is negative */
350 if (diff_by_scaled_ppm(1ULL << 35, scaled_ppm, &u64_delta))
351 lan743x_rate_adj = (u32)u64_delta;
352 else
353 lan743x_rate_adj = (u32)u64_delta | PTP_CLOCK_RATE_ADJ_DIR_;
354
355 lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
356 lan743x_rate_adj);
357
358 return 0;
359 }
360
lan743x_ptpci_adjtime(struct ptp_clock_info * ptpci,s64 delta)361 static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
362 {
363 struct lan743x_ptp *ptp =
364 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
365 struct lan743x_adapter *adapter =
366 container_of(ptp, struct lan743x_adapter, ptp);
367
368 lan743x_ptp_clock_step(adapter, delta);
369
370 return 0;
371 }
372
lan743x_ptpci_gettime64(struct ptp_clock_info * ptpci,struct timespec64 * ts)373 static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci,
374 struct timespec64 *ts)
375 {
376 struct lan743x_ptp *ptp =
377 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
378 struct lan743x_adapter *adapter =
379 container_of(ptp, struct lan743x_adapter, ptp);
380 u32 nano_seconds = 0;
381 u32 seconds = 0;
382
383 if (adapter->is_pci11x1x)
384 lan743x_ptp_io_clock_get(adapter, &seconds, &nano_seconds,
385 NULL);
386 else
387 lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
388 ts->tv_sec = seconds;
389 ts->tv_nsec = nano_seconds;
390
391 return 0;
392 }
393
lan743x_ptpci_settime64(struct ptp_clock_info * ptpci,const struct timespec64 * ts)394 static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci,
395 const struct timespec64 *ts)
396 {
397 struct lan743x_ptp *ptp =
398 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
399 struct lan743x_adapter *adapter =
400 container_of(ptp, struct lan743x_adapter, ptp);
401 u32 nano_seconds = 0;
402 u32 seconds = 0;
403
404 if (ts) {
405 if (ts->tv_sec > 0xFFFFFFFFLL ||
406 ts->tv_sec < 0) {
407 netif_warn(adapter, drv, adapter->netdev,
408 "ts->tv_sec out of range, %lld\n",
409 ts->tv_sec);
410 return -ERANGE;
411 }
412 if (ts->tv_nsec >= 1000000000L ||
413 ts->tv_nsec < 0) {
414 netif_warn(adapter, drv, adapter->netdev,
415 "ts->tv_nsec out of range, %ld\n",
416 ts->tv_nsec);
417 return -ERANGE;
418 }
419 seconds = ts->tv_sec;
420 nano_seconds = ts->tv_nsec;
421 lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
422 } else {
423 netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n");
424 return -EINVAL;
425 }
426
427 return 0;
428 }
429
lan743x_ptp_perout_off(struct lan743x_adapter * adapter,unsigned int index)430 static void lan743x_ptp_perout_off(struct lan743x_adapter *adapter,
431 unsigned int index)
432 {
433 struct lan743x_ptp *ptp = &adapter->ptp;
434 u32 general_config = 0;
435 struct lan743x_ptp_perout *perout = &ptp->perout[index];
436
437 if (perout->gpio_pin >= 0) {
438 lan743x_gpio_release(adapter, perout->gpio_pin);
439 perout->gpio_pin = -1;
440 }
441
442 if (perout->event_ch >= 0) {
443 /* set target to far in the future, effectively disabling it */
444 lan743x_csr_write(adapter,
445 PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
446 0xFFFF0000);
447 lan743x_csr_write(adapter,
448 PTP_CLOCK_TARGET_NS_X(perout->event_ch),
449 0);
450
451 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
452 general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_
453 (perout->event_ch);
454 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
455 lan743x_ptp_release_event_ch(adapter, perout->event_ch);
456 perout->event_ch = -1;
457 }
458 }
459
lan743x_ptp_perout(struct lan743x_adapter * adapter,int on,struct ptp_perout_request * perout_request)460 static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on,
461 struct ptp_perout_request *perout_request)
462 {
463 struct lan743x_ptp *ptp = &adapter->ptp;
464 u32 period_sec = 0, period_nsec = 0;
465 u32 start_sec = 0, start_nsec = 0;
466 u32 general_config = 0;
467 int pulse_width = 0;
468 int perout_pin = 0;
469 unsigned int index = perout_request->index;
470 struct lan743x_ptp_perout *perout = &ptp->perout[index];
471 int ret = 0;
472
473 /* Reject requests with unsupported flags */
474 if (perout_request->flags & ~PTP_PEROUT_DUTY_CYCLE)
475 return -EOPNOTSUPP;
476
477 if (on) {
478 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT,
479 perout_request->index);
480 if (perout_pin < 0)
481 return -EBUSY;
482 } else {
483 lan743x_ptp_perout_off(adapter, index);
484 return 0;
485 }
486
487 if (perout->event_ch >= 0 ||
488 perout->gpio_pin >= 0) {
489 /* already on, turn off first */
490 lan743x_ptp_perout_off(adapter, index);
491 }
492
493 perout->event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
494
495 if (perout->event_ch < 0) {
496 netif_warn(adapter, drv, adapter->netdev,
497 "Failed to reserve event channel %d for PEROUT\n",
498 index);
499 ret = -EBUSY;
500 goto failed;
501 }
502
503 perout->gpio_pin = lan743x_gpio_rsrv_ptp_out(adapter,
504 perout_pin,
505 perout->event_ch);
506
507 if (perout->gpio_pin < 0) {
508 netif_warn(adapter, drv, adapter->netdev,
509 "Failed to reserve gpio %d for PEROUT\n",
510 perout_pin);
511 ret = -EBUSY;
512 goto failed;
513 }
514
515 start_sec = perout_request->start.sec;
516 start_sec += perout_request->start.nsec / 1000000000;
517 start_nsec = perout_request->start.nsec % 1000000000;
518
519 period_sec = perout_request->period.sec;
520 period_sec += perout_request->period.nsec / 1000000000;
521 period_nsec = perout_request->period.nsec % 1000000000;
522
523 if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) {
524 struct timespec64 ts_on, ts_period;
525 s64 wf_high, period64, half;
526 s32 reminder;
527
528 ts_on.tv_sec = perout_request->on.sec;
529 ts_on.tv_nsec = perout_request->on.nsec;
530 wf_high = timespec64_to_ns(&ts_on);
531 ts_period.tv_sec = perout_request->period.sec;
532 ts_period.tv_nsec = perout_request->period.nsec;
533 period64 = timespec64_to_ns(&ts_period);
534
535 if (period64 < 200) {
536 netif_warn(adapter, drv, adapter->netdev,
537 "perout period too small, minimum is 200nS\n");
538 ret = -EOPNOTSUPP;
539 goto failed;
540 }
541 if (wf_high >= period64) {
542 netif_warn(adapter, drv, adapter->netdev,
543 "pulse width must be smaller than period\n");
544 ret = -EINVAL;
545 goto failed;
546 }
547
548 /* Check if we can do 50% toggle on an even value of period.
549 * If the period number is odd, then check if the requested
550 * pulse width is the same as one of pre-defined width values.
551 * Otherwise, return failure.
552 */
553 half = div_s64_rem(period64, 2, &reminder);
554 if (!reminder) {
555 if (half == wf_high) {
556 /* It's 50% match. Use the toggle option */
557 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_TOGGLE_;
558 /* In this case, devide period value by 2 */
559 ts_period = ns_to_timespec64(div_s64(period64, 2));
560 period_sec = ts_period.tv_sec;
561 period_nsec = ts_period.tv_nsec;
562
563 goto program;
564 }
565 }
566 /* if we can't do toggle, then the width option needs to be the exact match */
567 if (wf_high == 200000000) {
568 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
569 } else if (wf_high == 10000000) {
570 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
571 } else if (wf_high == 1000000) {
572 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
573 } else if (wf_high == 100000) {
574 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
575 } else if (wf_high == 10000) {
576 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
577 } else if (wf_high == 100) {
578 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
579 } else {
580 netif_warn(adapter, drv, adapter->netdev,
581 "duty cycle specified is not supported\n");
582 ret = -EOPNOTSUPP;
583 goto failed;
584 }
585 } else {
586 if (period_sec == 0) {
587 if (period_nsec >= 400000000) {
588 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
589 } else if (period_nsec >= 20000000) {
590 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
591 } else if (period_nsec >= 2000000) {
592 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
593 } else if (period_nsec >= 200000) {
594 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
595 } else if (period_nsec >= 20000) {
596 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
597 } else if (period_nsec >= 200) {
598 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
599 } else {
600 netif_warn(adapter, drv, adapter->netdev,
601 "perout period too small, minimum is 200nS\n");
602 ret = -EOPNOTSUPP;
603 goto failed;
604 }
605 } else {
606 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
607 }
608 }
609 program:
610
611 /* turn off by setting target far in future */
612 lan743x_csr_write(adapter,
613 PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
614 0xFFFF0000);
615 lan743x_csr_write(adapter,
616 PTP_CLOCK_TARGET_NS_X(perout->event_ch), 0);
617
618 /* Configure to pulse every period */
619 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
620 general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
621 (perout->event_ch));
622 general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
623 (perout->event_ch, pulse_width);
624 general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_
625 (perout->event_ch);
626 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
627
628 /* set the reload to one toggle cycle */
629 lan743x_csr_write(adapter,
630 PTP_CLOCK_TARGET_RELOAD_SEC_X(perout->event_ch),
631 period_sec);
632 lan743x_csr_write(adapter,
633 PTP_CLOCK_TARGET_RELOAD_NS_X(perout->event_ch),
634 period_nsec);
635
636 /* set the start time */
637 lan743x_csr_write(adapter,
638 PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
639 start_sec);
640 lan743x_csr_write(adapter,
641 PTP_CLOCK_TARGET_NS_X(perout->event_ch),
642 start_nsec);
643
644 return 0;
645
646 failed:
647 lan743x_ptp_perout_off(adapter, index);
648 return ret;
649 }
650
lan743x_ptp_io_perout_off(struct lan743x_adapter * adapter,u32 index)651 static void lan743x_ptp_io_perout_off(struct lan743x_adapter *adapter,
652 u32 index)
653 {
654 struct lan743x_ptp *ptp = &adapter->ptp;
655 int perout_pin;
656 int event_ch;
657 u32 gen_cfg;
658 int val;
659
660 event_ch = ptp->ptp_io_perout[index];
661 if (event_ch >= 0) {
662 /* set target to far in the future, effectively disabling it */
663 lan743x_csr_write(adapter,
664 PTP_CLOCK_TARGET_SEC_X(event_ch),
665 0xFFFF0000);
666 lan743x_csr_write(adapter,
667 PTP_CLOCK_TARGET_NS_X(event_ch),
668 0);
669
670 gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG);
671 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
672 (event_ch));
673 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch));
674 gen_cfg |= HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch);
675 lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg);
676 if (event_ch)
677 lan743x_csr_write(adapter, PTP_INT_STS,
678 PTP_INT_TIMER_INT_B_);
679 else
680 lan743x_csr_write(adapter, PTP_INT_STS,
681 PTP_INT_TIMER_INT_A_);
682 lan743x_ptp_release_event_ch(adapter, event_ch);
683 ptp->ptp_io_perout[index] = -1;
684 }
685
686 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index);
687
688 /* Deselect Event output */
689 val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG);
690
691 /* Disables the output of Local Time Target compare events */
692 val &= ~PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin);
693 lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val);
694
695 /* Configured as an opendrain driver*/
696 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
697 val &= ~PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin);
698 lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val);
699 /* Dummy read to make sure write operation success */
700 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
701 }
702
lan743x_ptp_io_perout(struct lan743x_adapter * adapter,int on,struct ptp_perout_request * perout_request)703 static int lan743x_ptp_io_perout(struct lan743x_adapter *adapter, int on,
704 struct ptp_perout_request *perout_request)
705 {
706 struct lan743x_ptp *ptp = &adapter->ptp;
707 u32 period_sec, period_nsec;
708 u32 start_sec, start_nsec;
709 u32 pulse_sec, pulse_nsec;
710 int pulse_width;
711 int perout_pin;
712 int event_ch;
713 u32 gen_cfg;
714 u32 index;
715 int val;
716
717 index = perout_request->index;
718 event_ch = ptp->ptp_io_perout[index];
719
720 if (on) {
721 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index);
722 if (perout_pin < 0)
723 return -EBUSY;
724 } else {
725 lan743x_ptp_io_perout_off(adapter, index);
726 return 0;
727 }
728
729 if (event_ch >= LAN743X_PTP_N_EVENT_CHAN) {
730 /* already on, turn off first */
731 lan743x_ptp_io_perout_off(adapter, index);
732 }
733
734 event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
735 if (event_ch < 0) {
736 netif_warn(adapter, drv, adapter->netdev,
737 "Failed to reserve event channel %d for PEROUT\n",
738 index);
739 goto failed;
740 }
741 ptp->ptp_io_perout[index] = event_ch;
742
743 if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) {
744 pulse_sec = perout_request->on.sec;
745 pulse_sec += perout_request->on.nsec / 1000000000;
746 pulse_nsec = perout_request->on.nsec % 1000000000;
747 } else {
748 pulse_sec = perout_request->period.sec;
749 pulse_sec += perout_request->period.nsec / 1000000000;
750 pulse_nsec = perout_request->period.nsec % 1000000000;
751 }
752
753 if (pulse_sec == 0) {
754 if (pulse_nsec >= 400000000) {
755 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
756 } else if (pulse_nsec >= 200000000) {
757 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100MS_;
758 } else if (pulse_nsec >= 100000000) {
759 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50MS_;
760 } else if (pulse_nsec >= 20000000) {
761 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
762 } else if (pulse_nsec >= 10000000) {
763 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5MS_;
764 } else if (pulse_nsec >= 2000000) {
765 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
766 } else if (pulse_nsec >= 1000000) {
767 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500US_;
768 } else if (pulse_nsec >= 200000) {
769 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
770 } else if (pulse_nsec >= 100000) {
771 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50US_;
772 } else if (pulse_nsec >= 20000) {
773 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
774 } else if (pulse_nsec >= 10000) {
775 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5US_;
776 } else if (pulse_nsec >= 2000) {
777 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1US_;
778 } else if (pulse_nsec >= 1000) {
779 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500NS_;
780 } else if (pulse_nsec >= 200) {
781 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
782 } else {
783 netif_warn(adapter, drv, adapter->netdev,
784 "perout period too small, min is 200nS\n");
785 goto failed;
786 }
787 } else {
788 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
789 }
790
791 /* turn off by setting target far in future */
792 lan743x_csr_write(adapter,
793 PTP_CLOCK_TARGET_SEC_X(event_ch),
794 0xFFFF0000);
795 lan743x_csr_write(adapter,
796 PTP_CLOCK_TARGET_NS_X(event_ch), 0);
797
798 /* Configure to pulse every period */
799 gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG);
800 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_(event_ch));
801 gen_cfg |= HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
802 (event_ch, pulse_width);
803 gen_cfg |= HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch);
804 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch));
805 lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg);
806
807 /* set the reload to one toggle cycle */
808 period_sec = perout_request->period.sec;
809 period_sec += perout_request->period.nsec / 1000000000;
810 period_nsec = perout_request->period.nsec % 1000000000;
811 lan743x_csr_write(adapter,
812 PTP_CLOCK_TARGET_RELOAD_SEC_X(event_ch),
813 period_sec);
814 lan743x_csr_write(adapter,
815 PTP_CLOCK_TARGET_RELOAD_NS_X(event_ch),
816 period_nsec);
817
818 start_sec = perout_request->start.sec;
819 start_sec += perout_request->start.nsec / 1000000000;
820 start_nsec = perout_request->start.nsec % 1000000000;
821
822 /* set the start time */
823 lan743x_csr_write(adapter,
824 PTP_CLOCK_TARGET_SEC_X(event_ch),
825 start_sec);
826 lan743x_csr_write(adapter,
827 PTP_CLOCK_TARGET_NS_X(event_ch),
828 start_nsec);
829
830 /* Enable LTC Target Read */
831 val = lan743x_csr_read(adapter, PTP_CMD_CTL);
832 val |= PTP_CMD_CTL_PTP_LTC_TARGET_READ_;
833 lan743x_csr_write(adapter, PTP_CMD_CTL, val);
834
835 /* Configure as an push/pull driver */
836 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
837 val |= PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin);
838 lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val);
839
840 /* Select Event output */
841 val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG);
842 if (event_ch)
843 /* Channel B as the output */
844 val |= PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin);
845 else
846 /* Channel A as the output */
847 val &= ~PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin);
848
849 /* Enables the output of Local Time Target compare events */
850 val |= PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin);
851 lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val);
852
853 return 0;
854
855 failed:
856 lan743x_ptp_io_perout_off(adapter, index);
857 return -ENODEV;
858 }
859
lan743x_ptp_io_extts_off(struct lan743x_adapter * adapter,u32 index)860 static void lan743x_ptp_io_extts_off(struct lan743x_adapter *adapter,
861 u32 index)
862 {
863 struct lan743x_ptp *ptp = &adapter->ptp;
864 struct lan743x_extts *extts;
865 int val;
866
867 extts = &ptp->extts[index];
868 /* PTP Interrupt Enable Clear Register */
869 if (extts->flags & PTP_FALLING_EDGE)
870 val = PTP_INT_EN_FE_EN_CLR_(index);
871 else
872 val = PTP_INT_EN_RE_EN_CLR_(index);
873 lan743x_csr_write(adapter, PTP_INT_EN_CLR, val);
874
875 /* Disables PTP-IO edge lock */
876 val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG);
877 if (extts->flags & PTP_FALLING_EDGE) {
878 val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(index);
879 val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(index);
880 } else {
881 val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(index);
882 val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(index);
883 }
884 lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val);
885
886 /* PTP-IO De-select register */
887 val = lan743x_csr_read(adapter, PTP_IO_SEL);
888 val &= ~PTP_IO_SEL_MASK_;
889 lan743x_csr_write(adapter, PTP_IO_SEL, val);
890
891 /* Clear timestamp */
892 memset(&extts->ts, 0, sizeof(struct timespec64));
893 extts->flags = 0;
894 }
895
lan743x_ptp_io_event_cap_en(struct lan743x_adapter * adapter,u32 flags,u32 channel)896 static int lan743x_ptp_io_event_cap_en(struct lan743x_adapter *adapter,
897 u32 flags, u32 channel)
898 {
899 struct lan743x_ptp *ptp = &adapter->ptp;
900 int val;
901
902 if ((flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES)
903 return -EOPNOTSUPP;
904
905 mutex_lock(&ptp->command_lock);
906 /* PTP-IO Event Capture Enable */
907 val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG);
908 if (flags & PTP_FALLING_EDGE) {
909 val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(channel);
910 val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel);
911 val |= PTP_IO_CAP_CONFIG_LOCK_FE_(channel);
912 val |= PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel);
913 } else {
914 /* Rising eventing as Default */
915 val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(channel);
916 val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel);
917 val |= PTP_IO_CAP_CONFIG_LOCK_RE_(channel);
918 val |= PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel);
919 }
920 lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val);
921
922 /* PTP-IO Select */
923 val = lan743x_csr_read(adapter, PTP_IO_SEL);
924 val &= ~PTP_IO_SEL_MASK_;
925 val |= channel << PTP_IO_SEL_SHIFT_;
926 lan743x_csr_write(adapter, PTP_IO_SEL, val);
927
928 /* PTP Interrupt Enable Register */
929 if (flags & PTP_FALLING_EDGE)
930 val = PTP_INT_EN_FE_EN_SET_(channel);
931 else
932 val = PTP_INT_EN_RE_EN_SET_(channel);
933 lan743x_csr_write(adapter, PTP_INT_EN_SET, val);
934
935 mutex_unlock(&ptp->command_lock);
936
937 return 0;
938 }
939
lan743x_ptp_io_extts(struct lan743x_adapter * adapter,int on,struct ptp_extts_request * extts_request)940 static int lan743x_ptp_io_extts(struct lan743x_adapter *adapter, int on,
941 struct ptp_extts_request *extts_request)
942 {
943 struct lan743x_ptp *ptp = &adapter->ptp;
944 u32 flags = extts_request->flags;
945 u32 index = extts_request->index;
946 struct lan743x_extts *extts;
947 int extts_pin;
948 int ret = 0;
949
950 extts = &ptp->extts[index];
951
952 if (on) {
953 extts_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS, index);
954 if (extts_pin < 0)
955 return -EBUSY;
956
957 ret = lan743x_ptp_io_event_cap_en(adapter, flags, index);
958 if (!ret)
959 extts->flags = flags;
960 } else {
961 lan743x_ptp_io_extts_off(adapter, index);
962 }
963
964 return ret;
965 }
966
lan743x_ptpci_enable(struct ptp_clock_info * ptpci,struct ptp_clock_request * request,int on)967 static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci,
968 struct ptp_clock_request *request, int on)
969 {
970 struct lan743x_ptp *ptp =
971 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
972 struct lan743x_adapter *adapter =
973 container_of(ptp, struct lan743x_adapter, ptp);
974
975 if (request) {
976 switch (request->type) {
977 case PTP_CLK_REQ_EXTTS:
978 if (request->extts.index < ptpci->n_ext_ts)
979 return lan743x_ptp_io_extts(adapter, on,
980 &request->extts);
981 return -EINVAL;
982 case PTP_CLK_REQ_PEROUT:
983 if (request->perout.index < ptpci->n_per_out) {
984 if (adapter->is_pci11x1x)
985 return lan743x_ptp_io_perout(adapter, on,
986 &request->perout);
987 else
988 return lan743x_ptp_perout(adapter, on,
989 &request->perout);
990 }
991 return -EINVAL;
992 case PTP_CLK_REQ_PPS:
993 return -EINVAL;
994 default:
995 netif_err(adapter, drv, adapter->netdev,
996 "request->type == %d, Unknown\n",
997 request->type);
998 break;
999 }
1000 } else {
1001 netif_err(adapter, drv, adapter->netdev, "request == NULL\n");
1002 }
1003 return 0;
1004 }
1005
lan743x_ptpci_verify_pin_config(struct ptp_clock_info * ptp,unsigned int pin,enum ptp_pin_function func,unsigned int chan)1006 static int lan743x_ptpci_verify_pin_config(struct ptp_clock_info *ptp,
1007 unsigned int pin,
1008 enum ptp_pin_function func,
1009 unsigned int chan)
1010 {
1011 struct lan743x_ptp *lan_ptp =
1012 container_of(ptp, struct lan743x_ptp, ptp_clock_info);
1013 struct lan743x_adapter *adapter =
1014 container_of(lan_ptp, struct lan743x_adapter, ptp);
1015 int result = 0;
1016
1017 /* Confirm the requested function is supported. Parameter
1018 * validation is done by the caller.
1019 */
1020 switch (func) {
1021 case PTP_PF_NONE:
1022 case PTP_PF_PEROUT:
1023 break;
1024 case PTP_PF_EXTTS:
1025 if (!adapter->is_pci11x1x)
1026 result = -1;
1027 break;
1028 case PTP_PF_PHYSYNC:
1029 default:
1030 result = -1;
1031 break;
1032 }
1033 return result;
1034 }
1035
lan743x_ptp_io_event_clock_get(struct lan743x_adapter * adapter,bool fe,u8 channel,struct timespec64 * ts)1036 static void lan743x_ptp_io_event_clock_get(struct lan743x_adapter *adapter,
1037 bool fe, u8 channel,
1038 struct timespec64 *ts)
1039 {
1040 struct lan743x_ptp *ptp = &adapter->ptp;
1041 struct lan743x_extts *extts;
1042 u32 sec, nsec;
1043
1044 mutex_lock(&ptp->command_lock);
1045 if (fe) {
1046 sec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_SEC_CAP_X);
1047 nsec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_NS_CAP_X);
1048 } else {
1049 sec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_SEC_CAP_X);
1050 nsec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_NS_CAP_X);
1051 }
1052
1053 mutex_unlock(&ptp->command_lock);
1054
1055 /* Update Local timestamp */
1056 extts = &ptp->extts[channel];
1057 extts->ts.tv_sec = sec;
1058 extts->ts.tv_nsec = nsec;
1059 ts->tv_sec = sec;
1060 ts->tv_nsec = nsec;
1061 }
1062
lan743x_ptpci_do_aux_work(struct ptp_clock_info * ptpci)1063 static long lan743x_ptpci_do_aux_work(struct ptp_clock_info *ptpci)
1064 {
1065 struct lan743x_ptp *ptp =
1066 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
1067 struct lan743x_adapter *adapter =
1068 container_of(ptp, struct lan743x_adapter, ptp);
1069 u32 cap_info, cause, header, nsec, seconds;
1070 bool new_timestamp_available = false;
1071 struct ptp_clock_event ptp_event;
1072 struct timespec64 ts;
1073 int ptp_int_sts;
1074 int count = 0;
1075 int channel;
1076 s64 ns;
1077
1078 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
1079 while ((count < 100) && ptp_int_sts) {
1080 count++;
1081
1082 if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
1083 cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO);
1084
1085 if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) {
1086 seconds = lan743x_csr_read(adapter,
1087 PTP_TX_EGRESS_SEC);
1088 nsec = lan743x_csr_read(adapter,
1089 PTP_TX_EGRESS_NS);
1090 cause = (nsec &
1091 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_);
1092 header = lan743x_csr_read(adapter,
1093 PTP_TX_MSG_HEADER);
1094
1095 if (cause ==
1096 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) {
1097 nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_;
1098 lan743x_ptp_tx_ts_enqueue_ts(adapter,
1099 seconds,
1100 nsec,
1101 header);
1102 new_timestamp_available = true;
1103 } else if (cause ==
1104 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) {
1105 netif_err(adapter, drv, adapter->netdev,
1106 "Auto capture cause not supported\n");
1107 } else {
1108 netif_warn(adapter, drv, adapter->netdev,
1109 "unknown tx timestamp capture cause\n");
1110 }
1111 } else {
1112 netif_warn(adapter, drv, adapter->netdev,
1113 "TX TS INT but no TX TS CNT\n");
1114 }
1115 lan743x_csr_write(adapter, PTP_INT_STS,
1116 PTP_INT_BIT_TX_TS_);
1117 }
1118
1119 if (ptp_int_sts & PTP_INT_IO_FE_MASK_) {
1120 do {
1121 channel = lan743x_get_channel((ptp_int_sts &
1122 PTP_INT_IO_FE_MASK_) >>
1123 PTP_INT_IO_FE_SHIFT_);
1124 if (channel >= 0 &&
1125 channel < PCI11X1X_PTP_IO_MAX_CHANNELS) {
1126 lan743x_ptp_io_event_clock_get(adapter,
1127 true,
1128 channel,
1129 &ts);
1130 /* PTP Falling Event post */
1131 ns = timespec64_to_ns(&ts);
1132 ptp_event.timestamp = ns;
1133 ptp_event.index = channel;
1134 ptp_event.type = PTP_CLOCK_EXTTS;
1135 ptp_clock_event(ptp->ptp_clock,
1136 &ptp_event);
1137 lan743x_csr_write(adapter, PTP_INT_STS,
1138 PTP_INT_IO_FE_SET_
1139 (channel));
1140 ptp_int_sts &= ~(1 <<
1141 (PTP_INT_IO_FE_SHIFT_ +
1142 channel));
1143 } else {
1144 /* Clear falling event interrupts */
1145 lan743x_csr_write(adapter, PTP_INT_STS,
1146 PTP_INT_IO_FE_MASK_);
1147 ptp_int_sts &= ~PTP_INT_IO_FE_MASK_;
1148 }
1149 } while (ptp_int_sts & PTP_INT_IO_FE_MASK_);
1150 }
1151
1152 if (ptp_int_sts & PTP_INT_IO_RE_MASK_) {
1153 do {
1154 channel = lan743x_get_channel((ptp_int_sts &
1155 PTP_INT_IO_RE_MASK_) >>
1156 PTP_INT_IO_RE_SHIFT_);
1157 if (channel >= 0 &&
1158 channel < PCI11X1X_PTP_IO_MAX_CHANNELS) {
1159 lan743x_ptp_io_event_clock_get(adapter,
1160 false,
1161 channel,
1162 &ts);
1163 /* PTP Rising Event post */
1164 ns = timespec64_to_ns(&ts);
1165 ptp_event.timestamp = ns;
1166 ptp_event.index = channel;
1167 ptp_event.type = PTP_CLOCK_EXTTS;
1168 ptp_clock_event(ptp->ptp_clock,
1169 &ptp_event);
1170 lan743x_csr_write(adapter, PTP_INT_STS,
1171 PTP_INT_IO_RE_SET_
1172 (channel));
1173 ptp_int_sts &= ~(1 <<
1174 (PTP_INT_IO_RE_SHIFT_ +
1175 channel));
1176 } else {
1177 /* Clear Rising event interrupt */
1178 lan743x_csr_write(adapter, PTP_INT_STS,
1179 PTP_INT_IO_RE_MASK_);
1180 ptp_int_sts &= ~PTP_INT_IO_RE_MASK_;
1181 }
1182 } while (ptp_int_sts & PTP_INT_IO_RE_MASK_);
1183 }
1184
1185 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
1186 }
1187
1188 if (new_timestamp_available)
1189 lan743x_ptp_tx_ts_complete(adapter);
1190
1191 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
1192
1193 return -1;
1194 }
1195
lan743x_ptp_clock_get(struct lan743x_adapter * adapter,u32 * seconds,u32 * nano_seconds,u32 * sub_nano_seconds)1196 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
1197 u32 *seconds, u32 *nano_seconds,
1198 u32 *sub_nano_seconds)
1199 {
1200 struct lan743x_ptp *ptp = &adapter->ptp;
1201
1202 mutex_lock(&ptp->command_lock);
1203
1204 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
1205 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
1206
1207 if (seconds)
1208 (*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC);
1209
1210 if (nano_seconds)
1211 (*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS);
1212
1213 if (sub_nano_seconds)
1214 (*sub_nano_seconds) =
1215 lan743x_csr_read(adapter, PTP_CLOCK_SUBNS);
1216
1217 mutex_unlock(&ptp->command_lock);
1218 }
1219
lan743x_ptp_io_clock_get(struct lan743x_adapter * adapter,u32 * sec,u32 * nsec,u32 * sub_nsec)1220 static void lan743x_ptp_io_clock_get(struct lan743x_adapter *adapter,
1221 u32 *sec, u32 *nsec, u32 *sub_nsec)
1222 {
1223 struct lan743x_ptp *ptp = &adapter->ptp;
1224
1225 mutex_lock(&ptp->command_lock);
1226 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
1227 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
1228
1229 if (sec)
1230 (*sec) = lan743x_csr_read(adapter, PTP_LTC_RD_SEC_LO);
1231
1232 if (nsec)
1233 (*nsec) = lan743x_csr_read(adapter, PTP_LTC_RD_NS);
1234
1235 if (sub_nsec)
1236 (*sub_nsec) =
1237 lan743x_csr_read(adapter, PTP_LTC_RD_SUBNS);
1238
1239 mutex_unlock(&ptp->command_lock);
1240 }
1241
lan743x_ptp_clock_step(struct lan743x_adapter * adapter,s64 time_step_ns)1242 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
1243 s64 time_step_ns)
1244 {
1245 struct lan743x_ptp *ptp = &adapter->ptp;
1246 u32 nano_seconds_step = 0;
1247 u64 abs_time_step_ns = 0;
1248 u32 unsigned_seconds = 0;
1249 u32 nano_seconds = 0;
1250 u32 remainder = 0;
1251 s32 seconds = 0;
1252
1253 if (time_step_ns > 15000000000LL) {
1254 /* convert to clock set */
1255 if (adapter->is_pci11x1x)
1256 lan743x_ptp_io_clock_get(adapter, &unsigned_seconds,
1257 &nano_seconds, NULL);
1258 else
1259 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
1260 &nano_seconds, NULL);
1261 unsigned_seconds += div_u64_rem(time_step_ns, 1000000000LL,
1262 &remainder);
1263 nano_seconds += remainder;
1264 if (nano_seconds >= 1000000000) {
1265 unsigned_seconds++;
1266 nano_seconds -= 1000000000;
1267 }
1268 lan743x_ptp_clock_set(adapter, unsigned_seconds,
1269 nano_seconds, 0);
1270 return;
1271 } else if (time_step_ns < -15000000000LL) {
1272 /* convert to clock set */
1273 time_step_ns = -time_step_ns;
1274
1275 if (adapter->is_pci11x1x) {
1276 lan743x_ptp_io_clock_get(adapter, &unsigned_seconds,
1277 &nano_seconds, NULL);
1278 } else {
1279 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
1280 &nano_seconds, NULL);
1281 }
1282 unsigned_seconds -= div_u64_rem(time_step_ns, 1000000000LL,
1283 &remainder);
1284 nano_seconds_step = remainder;
1285 if (nano_seconds < nano_seconds_step) {
1286 unsigned_seconds--;
1287 nano_seconds += 1000000000;
1288 }
1289 nano_seconds -= nano_seconds_step;
1290 lan743x_ptp_clock_set(adapter, unsigned_seconds,
1291 nano_seconds, 0);
1292 return;
1293 }
1294
1295 /* do clock step */
1296 if (time_step_ns >= 0) {
1297 abs_time_step_ns = (u64)(time_step_ns);
1298 seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000,
1299 &remainder);
1300 nano_seconds = (u32)remainder;
1301 } else {
1302 abs_time_step_ns = (u64)(-time_step_ns);
1303 seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000,
1304 &remainder));
1305 nano_seconds = (u32)remainder;
1306 if (nano_seconds > 0) {
1307 /* subtracting nano seconds is not allowed
1308 * convert to subtracting from seconds,
1309 * and adding to nanoseconds
1310 */
1311 seconds--;
1312 nano_seconds = (1000000000 - nano_seconds);
1313 }
1314 }
1315
1316 if (nano_seconds > 0) {
1317 /* add 8 ns to cover the likely normal increment */
1318 nano_seconds += 8;
1319 }
1320
1321 if (nano_seconds >= 1000000000) {
1322 /* carry into seconds */
1323 seconds++;
1324 nano_seconds -= 1000000000;
1325 }
1326
1327 while (seconds) {
1328 mutex_lock(&ptp->command_lock);
1329 if (seconds > 0) {
1330 u32 adjustment_value = (u32)seconds;
1331
1332 if (adjustment_value > 0xF)
1333 adjustment_value = 0xF;
1334 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
1335 PTP_CLOCK_STEP_ADJ_DIR_ |
1336 adjustment_value);
1337 seconds -= ((s32)adjustment_value);
1338 } else {
1339 u32 adjustment_value = (u32)(-seconds);
1340
1341 if (adjustment_value > 0xF)
1342 adjustment_value = 0xF;
1343 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
1344 adjustment_value);
1345 seconds += ((s32)adjustment_value);
1346 }
1347 lan743x_csr_write(adapter, PTP_CMD_CTL,
1348 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
1349 lan743x_ptp_wait_till_cmd_done(adapter,
1350 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
1351 mutex_unlock(&ptp->command_lock);
1352 }
1353 if (nano_seconds) {
1354 mutex_lock(&ptp->command_lock);
1355 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
1356 PTP_CLOCK_STEP_ADJ_DIR_ |
1357 (nano_seconds &
1358 PTP_CLOCK_STEP_ADJ_VALUE_MASK_));
1359 lan743x_csr_write(adapter, PTP_CMD_CTL,
1360 PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
1361 lan743x_ptp_wait_till_cmd_done(adapter,
1362 PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
1363 mutex_unlock(&ptp->command_lock);
1364 }
1365 }
1366
lan743x_ptp_isr(void * context)1367 void lan743x_ptp_isr(void *context)
1368 {
1369 struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
1370 struct lan743x_ptp *ptp = NULL;
1371 int enable_flag = 1;
1372 u32 ptp_int_sts = 0;
1373
1374 ptp = &adapter->ptp;
1375
1376 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
1377
1378 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
1379 ptp_int_sts &= lan743x_csr_read(adapter, PTP_INT_EN_SET);
1380
1381 if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
1382 ptp_schedule_worker(ptp->ptp_clock, 0);
1383 enable_flag = 0;/* tasklet will re-enable later */
1384 }
1385 if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) {
1386 netif_err(adapter, drv, adapter->netdev,
1387 "PTP TX Software Timestamp Error\n");
1388 /* clear int status bit */
1389 lan743x_csr_write(adapter, PTP_INT_STS,
1390 PTP_INT_BIT_TX_SWTS_ERR_);
1391 }
1392 if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) {
1393 /* clear int status bit */
1394 lan743x_csr_write(adapter, PTP_INT_STS,
1395 PTP_INT_BIT_TIMER_B_);
1396 }
1397 if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) {
1398 /* clear int status bit */
1399 lan743x_csr_write(adapter, PTP_INT_STS,
1400 PTP_INT_BIT_TIMER_A_);
1401 }
1402
1403 if (enable_flag) {
1404 /* re-enable isr */
1405 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
1406 }
1407 }
1408
lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter * adapter,struct sk_buff * skb,bool ignore_sync)1409 static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter,
1410 struct sk_buff *skb, bool ignore_sync)
1411 {
1412 struct lan743x_ptp *ptp = &adapter->ptp;
1413
1414 spin_lock_bh(&ptp->tx_ts_lock);
1415 if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
1416 ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb;
1417 if (ignore_sync)
1418 ptp->tx_ts_ignore_sync_queue |=
1419 BIT(ptp->tx_ts_skb_queue_size);
1420 ptp->tx_ts_skb_queue_size++;
1421 } else {
1422 /* this should never happen, so long as the tx channel
1423 * calls and honors the result from
1424 * lan743x_ptp_request_tx_timestamp
1425 */
1426 netif_err(adapter, drv, adapter->netdev,
1427 "tx ts skb queue overflow\n");
1428 dev_kfree_skb(skb);
1429 }
1430 spin_unlock_bh(&ptp->tx_ts_lock);
1431 }
1432
lan743x_ptp_sync_to_system_clock(struct lan743x_adapter * adapter)1433 static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter)
1434 {
1435 struct timespec64 ts;
1436
1437 ktime_get_clocktai_ts64(&ts);
1438
1439 lan743x_ptp_clock_set(adapter, ts.tv_sec, ts.tv_nsec, 0);
1440 }
1441
lan743x_ptp_update_latency(struct lan743x_adapter * adapter,u32 link_speed)1442 void lan743x_ptp_update_latency(struct lan743x_adapter *adapter,
1443 u32 link_speed)
1444 {
1445 switch (link_speed) {
1446 case 10:
1447 lan743x_csr_write(adapter, PTP_LATENCY,
1448 PTP_LATENCY_TX_SET_(0) |
1449 PTP_LATENCY_RX_SET_(0));
1450 break;
1451 case 100:
1452 lan743x_csr_write(adapter, PTP_LATENCY,
1453 PTP_LATENCY_TX_SET_(181) |
1454 PTP_LATENCY_RX_SET_(594));
1455 break;
1456 case 1000:
1457 lan743x_csr_write(adapter, PTP_LATENCY,
1458 PTP_LATENCY_TX_SET_(30) |
1459 PTP_LATENCY_RX_SET_(525));
1460 break;
1461 }
1462 }
1463
lan743x_ptp_init(struct lan743x_adapter * adapter)1464 int lan743x_ptp_init(struct lan743x_adapter *adapter)
1465 {
1466 struct lan743x_ptp *ptp = &adapter->ptp;
1467 int i;
1468
1469 mutex_init(&ptp->command_lock);
1470 spin_lock_init(&ptp->tx_ts_lock);
1471 ptp->used_event_ch = 0;
1472
1473 for (i = 0; i < LAN743X_PTP_N_EVENT_CHAN; i++) {
1474 ptp->perout[i].event_ch = -1;
1475 ptp->perout[i].gpio_pin = -1;
1476 }
1477
1478 lan743x_led_mux_save(adapter);
1479
1480 return 0;
1481 }
1482
lan743x_ptp_open(struct lan743x_adapter * adapter)1483 int lan743x_ptp_open(struct lan743x_adapter *adapter)
1484 {
1485 struct lan743x_ptp *ptp = &adapter->ptp;
1486 int ret = -ENODEV;
1487 u32 temp;
1488 int i;
1489 int n_pins;
1490
1491 lan743x_ptp_reset(adapter);
1492 lan743x_ptp_sync_to_system_clock(adapter);
1493 temp = lan743x_csr_read(adapter, PTP_TX_MOD2);
1494 temp |= PTP_TX_MOD2_TX_PTP_CLR_UDPV4_CHKSUM_;
1495 lan743x_csr_write(adapter, PTP_TX_MOD2, temp);
1496 lan743x_ptp_enable(adapter);
1497 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
1498 lan743x_csr_write(adapter, PTP_INT_EN_SET,
1499 PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_);
1500 ptp->flags |= PTP_FLAG_ISR_ENABLED;
1501
1502 if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK))
1503 return 0;
1504
1505 switch (adapter->csr.id_rev & ID_REV_ID_MASK_) {
1506 case ID_REV_ID_LAN7430_:
1507 n_pins = LAN7430_N_GPIO;
1508 break;
1509 case ID_REV_ID_LAN7431_:
1510 case ID_REV_ID_A011_:
1511 case ID_REV_ID_A041_:
1512 n_pins = LAN7431_N_GPIO;
1513 break;
1514 default:
1515 netif_warn(adapter, drv, adapter->netdev,
1516 "Unknown LAN743x (%08x). Assuming no GPIO\n",
1517 adapter->csr.id_rev);
1518 n_pins = 0;
1519 break;
1520 }
1521
1522 if (n_pins > LAN743X_PTP_N_GPIO)
1523 n_pins = LAN743X_PTP_N_GPIO;
1524
1525 for (i = 0; i < n_pins; i++) {
1526 struct ptp_pin_desc *ptp_pin = &ptp->pin_config[i];
1527
1528 snprintf(ptp_pin->name,
1529 sizeof(ptp_pin->name), "lan743x_ptp_pin_%02d", i);
1530 ptp_pin->index = i;
1531 ptp_pin->func = PTP_PF_NONE;
1532 }
1533
1534 ptp->ptp_clock_info.owner = THIS_MODULE;
1535 snprintf(ptp->ptp_clock_info.name, 16, "%pm",
1536 adapter->netdev->dev_addr);
1537 ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB;
1538 ptp->ptp_clock_info.n_alarm = 0;
1539 ptp->ptp_clock_info.n_ext_ts = LAN743X_PTP_N_EXTTS;
1540 ptp->ptp_clock_info.n_per_out = LAN743X_PTP_N_EVENT_CHAN;
1541 ptp->ptp_clock_info.n_pins = n_pins;
1542 ptp->ptp_clock_info.pps = LAN743X_PTP_N_PPS;
1543 ptp->ptp_clock_info.pin_config = ptp->pin_config;
1544 ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine;
1545 ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime;
1546 ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64;
1547 ptp->ptp_clock_info.getcrosststamp = NULL;
1548 ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64;
1549 ptp->ptp_clock_info.enable = lan743x_ptpci_enable;
1550 ptp->ptp_clock_info.do_aux_work = lan743x_ptpci_do_aux_work;
1551 ptp->ptp_clock_info.verify = lan743x_ptpci_verify_pin_config;
1552
1553 ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info,
1554 &adapter->pdev->dev);
1555
1556 if (IS_ERR(ptp->ptp_clock)) {
1557 netif_err(adapter, ifup, adapter->netdev,
1558 "ptp_clock_register failed\n");
1559 goto done;
1560 }
1561 ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED;
1562 netif_info(adapter, ifup, adapter->netdev,
1563 "successfully registered ptp clock\n");
1564
1565 return 0;
1566 done:
1567 lan743x_ptp_close(adapter);
1568 return ret;
1569 }
1570
lan743x_ptp_close(struct lan743x_adapter * adapter)1571 void lan743x_ptp_close(struct lan743x_adapter *adapter)
1572 {
1573 struct lan743x_ptp *ptp = &adapter->ptp;
1574 int index;
1575
1576 if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) &&
1577 (ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED)) {
1578 ptp_clock_unregister(ptp->ptp_clock);
1579 ptp->ptp_clock = NULL;
1580 ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED;
1581 netif_info(adapter, drv, adapter->netdev,
1582 "ptp clock unregister\n");
1583 }
1584
1585 if (ptp->flags & PTP_FLAG_ISR_ENABLED) {
1586 lan743x_csr_write(adapter, PTP_INT_EN_CLR,
1587 PTP_INT_BIT_TX_SWTS_ERR_ |
1588 PTP_INT_BIT_TX_TS_);
1589 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
1590 ptp->flags &= ~PTP_FLAG_ISR_ENABLED;
1591 }
1592
1593 /* clean up pending timestamp requests */
1594 lan743x_ptp_tx_ts_complete(adapter);
1595 spin_lock_bh(&ptp->tx_ts_lock);
1596 for (index = 0;
1597 index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS;
1598 index++) {
1599 struct sk_buff *skb = ptp->tx_ts_skb_queue[index];
1600
1601 dev_kfree_skb(skb);
1602 ptp->tx_ts_skb_queue[index] = NULL;
1603 ptp->tx_ts_seconds_queue[index] = 0;
1604 ptp->tx_ts_nseconds_queue[index] = 0;
1605 }
1606 ptp->tx_ts_skb_queue_size = 0;
1607 ptp->tx_ts_queue_size = 0;
1608 ptp->pending_tx_timestamps = 0;
1609 spin_unlock_bh(&ptp->tx_ts_lock);
1610
1611 lan743x_led_mux_restore(adapter);
1612
1613 lan743x_ptp_disable(adapter);
1614 }
1615
lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter * adapter,bool ts_insert_enable)1616 static void lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter *adapter,
1617 bool ts_insert_enable)
1618 {
1619 u32 ptp_tx_mod = lan743x_csr_read(adapter, PTP_TX_MOD);
1620
1621 if (ts_insert_enable)
1622 ptp_tx_mod |= PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1623 else
1624 ptp_tx_mod &= ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1625
1626 lan743x_csr_write(adapter, PTP_TX_MOD, ptp_tx_mod);
1627 }
1628
lan743x_ptp_is_enabled(struct lan743x_adapter * adapter)1629 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter)
1630 {
1631 if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_)
1632 return true;
1633 return false;
1634 }
1635
lan743x_ptp_enable(struct lan743x_adapter * adapter)1636 static void lan743x_ptp_enable(struct lan743x_adapter *adapter)
1637 {
1638 struct lan743x_ptp *ptp = &adapter->ptp;
1639
1640 mutex_lock(&ptp->command_lock);
1641
1642 if (lan743x_ptp_is_enabled(adapter)) {
1643 netif_warn(adapter, drv, adapter->netdev,
1644 "PTP already enabled\n");
1645 goto done;
1646 }
1647 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_);
1648 done:
1649 mutex_unlock(&ptp->command_lock);
1650 }
1651
lan743x_ptp_disable(struct lan743x_adapter * adapter)1652 static void lan743x_ptp_disable(struct lan743x_adapter *adapter)
1653 {
1654 struct lan743x_ptp *ptp = &adapter->ptp;
1655
1656 mutex_lock(&ptp->command_lock);
1657 if (!lan743x_ptp_is_enabled(adapter)) {
1658 netif_warn(adapter, drv, adapter->netdev,
1659 "PTP already disabled\n");
1660 goto done;
1661 }
1662 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_DISABLE_);
1663 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_);
1664 done:
1665 mutex_unlock(&ptp->command_lock);
1666 }
1667
lan743x_ptp_reset(struct lan743x_adapter * adapter)1668 static void lan743x_ptp_reset(struct lan743x_adapter *adapter)
1669 {
1670 struct lan743x_ptp *ptp = &adapter->ptp;
1671
1672 mutex_lock(&ptp->command_lock);
1673
1674 if (lan743x_ptp_is_enabled(adapter)) {
1675 netif_err(adapter, drv, adapter->netdev,
1676 "Attempting reset while enabled\n");
1677 goto done;
1678 }
1679
1680 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_RESET_);
1681 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_);
1682 done:
1683 mutex_unlock(&ptp->command_lock);
1684 }
1685
lan743x_ptp_clock_set(struct lan743x_adapter * adapter,u32 seconds,u32 nano_seconds,u32 sub_nano_seconds)1686 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
1687 u32 seconds, u32 nano_seconds,
1688 u32 sub_nano_seconds)
1689 {
1690 struct lan743x_ptp *ptp = &adapter->ptp;
1691
1692 mutex_lock(&ptp->command_lock);
1693
1694 lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds);
1695 lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds);
1696 lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds);
1697
1698 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1699 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1700 mutex_unlock(&ptp->command_lock);
1701 }
1702
lan743x_ptp_request_tx_timestamp(struct lan743x_adapter * adapter)1703 bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter)
1704 {
1705 struct lan743x_ptp *ptp = &adapter->ptp;
1706 bool result = false;
1707
1708 spin_lock_bh(&ptp->tx_ts_lock);
1709 if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
1710 /* request granted */
1711 ptp->pending_tx_timestamps++;
1712 result = true;
1713 }
1714 spin_unlock_bh(&ptp->tx_ts_lock);
1715 return result;
1716 }
1717
lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter * adapter)1718 void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter)
1719 {
1720 struct lan743x_ptp *ptp = &adapter->ptp;
1721
1722 spin_lock_bh(&ptp->tx_ts_lock);
1723 if (ptp->pending_tx_timestamps > 0)
1724 ptp->pending_tx_timestamps--;
1725 else
1726 netif_err(adapter, drv, adapter->netdev,
1727 "unrequest failed, pending_tx_timestamps==0\n");
1728 spin_unlock_bh(&ptp->tx_ts_lock);
1729 }
1730
lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter * adapter,struct sk_buff * skb,bool ignore_sync)1731 void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
1732 struct sk_buff *skb, bool ignore_sync)
1733 {
1734 lan743x_ptp_tx_ts_enqueue_skb(adapter, skb, ignore_sync);
1735
1736 lan743x_ptp_tx_ts_complete(adapter);
1737 }
1738
lan743x_ptp_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)1739 int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1740 {
1741 struct lan743x_adapter *adapter = netdev_priv(netdev);
1742 struct hwtstamp_config config;
1743 int ret = 0;
1744 int index;
1745
1746 if (!ifr) {
1747 netif_err(adapter, drv, adapter->netdev,
1748 "SIOCSHWTSTAMP, ifr == NULL\n");
1749 return -EINVAL;
1750 }
1751
1752 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1753 return -EFAULT;
1754
1755 switch (config.tx_type) {
1756 case HWTSTAMP_TX_OFF:
1757 for (index = 0; index < adapter->used_tx_channels;
1758 index++)
1759 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1760 false, false);
1761 lan743x_ptp_set_sync_ts_insert(adapter, false);
1762 break;
1763 case HWTSTAMP_TX_ON:
1764 for (index = 0; index < adapter->used_tx_channels;
1765 index++)
1766 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1767 true, false);
1768 lan743x_ptp_set_sync_ts_insert(adapter, false);
1769 break;
1770 case HWTSTAMP_TX_ONESTEP_SYNC:
1771 for (index = 0; index < adapter->used_tx_channels;
1772 index++)
1773 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1774 true, true);
1775
1776 lan743x_ptp_set_sync_ts_insert(adapter, true);
1777 break;
1778 case HWTSTAMP_TX_ONESTEP_P2P:
1779 ret = -ERANGE;
1780 break;
1781 default:
1782 netif_warn(adapter, drv, adapter->netdev,
1783 " tx_type = %d, UNKNOWN\n", config.tx_type);
1784 ret = -EINVAL;
1785 break;
1786 }
1787
1788 if (!ret)
1789 return copy_to_user(ifr->ifr_data, &config,
1790 sizeof(config)) ? -EFAULT : 0;
1791 return ret;
1792 }
1793
