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 bool positive = true;
343 u64 u64_delta = 0;
344
345 if ((scaled_ppm < (-LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM)) ||
346 scaled_ppm > LAN743X_PTP_MAX_FINE_ADJ_IN_SCALED_PPM) {
347 return -EINVAL;
348 }
349 if (scaled_ppm > 0) {
350 u64_delta = (u64)scaled_ppm;
351 positive = true;
352 } else {
353 u64_delta = (u64)(-scaled_ppm);
354 positive = false;
355 }
356 u64_delta = (u64_delta << 19);
357 lan743x_rate_adj = div_u64(u64_delta, 1000000);
358
359 if (positive)
360 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
361
362 lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
363 lan743x_rate_adj);
364
365 return 0;
366 }
367
lan743x_ptpci_adjfreq(struct ptp_clock_info * ptpci,s32 delta_ppb)368 static int lan743x_ptpci_adjfreq(struct ptp_clock_info *ptpci, s32 delta_ppb)
369 {
370 struct lan743x_ptp *ptp =
371 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
372 struct lan743x_adapter *adapter =
373 container_of(ptp, struct lan743x_adapter, ptp);
374 u32 lan743x_rate_adj = 0;
375 bool positive = true;
376 u32 u32_delta = 0;
377 u64 u64_delta = 0;
378
379 if ((delta_ppb < (-LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB)) ||
380 delta_ppb > LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB) {
381 return -EINVAL;
382 }
383 if (delta_ppb > 0) {
384 u32_delta = (u32)delta_ppb;
385 positive = true;
386 } else {
387 u32_delta = (u32)(-delta_ppb);
388 positive = false;
389 }
390 u64_delta = (((u64)u32_delta) << 35);
391 lan743x_rate_adj = div_u64(u64_delta, 1000000000);
392
393 if (positive)
394 lan743x_rate_adj |= PTP_CLOCK_RATE_ADJ_DIR_;
395
396 lan743x_csr_write(adapter, PTP_CLOCK_RATE_ADJ,
397 lan743x_rate_adj);
398
399 return 0;
400 }
401
lan743x_ptpci_adjtime(struct ptp_clock_info * ptpci,s64 delta)402 static int lan743x_ptpci_adjtime(struct ptp_clock_info *ptpci, s64 delta)
403 {
404 struct lan743x_ptp *ptp =
405 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
406 struct lan743x_adapter *adapter =
407 container_of(ptp, struct lan743x_adapter, ptp);
408
409 lan743x_ptp_clock_step(adapter, delta);
410
411 return 0;
412 }
413
lan743x_ptpci_gettime64(struct ptp_clock_info * ptpci,struct timespec64 * ts)414 static int lan743x_ptpci_gettime64(struct ptp_clock_info *ptpci,
415 struct timespec64 *ts)
416 {
417 struct lan743x_ptp *ptp =
418 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
419 struct lan743x_adapter *adapter =
420 container_of(ptp, struct lan743x_adapter, ptp);
421 u32 nano_seconds = 0;
422 u32 seconds = 0;
423
424 if (adapter->is_pci11x1x)
425 lan743x_ptp_io_clock_get(adapter, &seconds, &nano_seconds,
426 NULL);
427 else
428 lan743x_ptp_clock_get(adapter, &seconds, &nano_seconds, NULL);
429 ts->tv_sec = seconds;
430 ts->tv_nsec = nano_seconds;
431
432 return 0;
433 }
434
lan743x_ptpci_settime64(struct ptp_clock_info * ptpci,const struct timespec64 * ts)435 static int lan743x_ptpci_settime64(struct ptp_clock_info *ptpci,
436 const struct timespec64 *ts)
437 {
438 struct lan743x_ptp *ptp =
439 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
440 struct lan743x_adapter *adapter =
441 container_of(ptp, struct lan743x_adapter, ptp);
442 u32 nano_seconds = 0;
443 u32 seconds = 0;
444
445 if (ts) {
446 if (ts->tv_sec > 0xFFFFFFFFLL ||
447 ts->tv_sec < 0) {
448 netif_warn(adapter, drv, adapter->netdev,
449 "ts->tv_sec out of range, %lld\n",
450 ts->tv_sec);
451 return -ERANGE;
452 }
453 if (ts->tv_nsec >= 1000000000L ||
454 ts->tv_nsec < 0) {
455 netif_warn(adapter, drv, adapter->netdev,
456 "ts->tv_nsec out of range, %ld\n",
457 ts->tv_nsec);
458 return -ERANGE;
459 }
460 seconds = ts->tv_sec;
461 nano_seconds = ts->tv_nsec;
462 lan743x_ptp_clock_set(adapter, seconds, nano_seconds, 0);
463 } else {
464 netif_warn(adapter, drv, adapter->netdev, "ts == NULL\n");
465 return -EINVAL;
466 }
467
468 return 0;
469 }
470
lan743x_ptp_perout_off(struct lan743x_adapter * adapter,unsigned int index)471 static void lan743x_ptp_perout_off(struct lan743x_adapter *adapter,
472 unsigned int index)
473 {
474 struct lan743x_ptp *ptp = &adapter->ptp;
475 u32 general_config = 0;
476 struct lan743x_ptp_perout *perout = &ptp->perout[index];
477
478 if (perout->gpio_pin >= 0) {
479 lan743x_gpio_release(adapter, perout->gpio_pin);
480 perout->gpio_pin = -1;
481 }
482
483 if (perout->event_ch >= 0) {
484 /* set target to far in the future, effectively disabling it */
485 lan743x_csr_write(adapter,
486 PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
487 0xFFFF0000);
488 lan743x_csr_write(adapter,
489 PTP_CLOCK_TARGET_NS_X(perout->event_ch),
490 0);
491
492 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
493 general_config |= PTP_GENERAL_CONFIG_RELOAD_ADD_X_
494 (perout->event_ch);
495 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
496 lan743x_ptp_release_event_ch(adapter, perout->event_ch);
497 perout->event_ch = -1;
498 }
499 }
500
lan743x_ptp_perout(struct lan743x_adapter * adapter,int on,struct ptp_perout_request * perout_request)501 static int lan743x_ptp_perout(struct lan743x_adapter *adapter, int on,
502 struct ptp_perout_request *perout_request)
503 {
504 struct lan743x_ptp *ptp = &adapter->ptp;
505 u32 period_sec = 0, period_nsec = 0;
506 u32 start_sec = 0, start_nsec = 0;
507 u32 general_config = 0;
508 int pulse_width = 0;
509 int perout_pin = 0;
510 unsigned int index = perout_request->index;
511 struct lan743x_ptp_perout *perout = &ptp->perout[index];
512 int ret = 0;
513
514 /* Reject requests with unsupported flags */
515 if (perout_request->flags & ~PTP_PEROUT_DUTY_CYCLE)
516 return -EOPNOTSUPP;
517
518 if (on) {
519 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT,
520 perout_request->index);
521 if (perout_pin < 0)
522 return -EBUSY;
523 } else {
524 lan743x_ptp_perout_off(adapter, index);
525 return 0;
526 }
527
528 if (perout->event_ch >= 0 ||
529 perout->gpio_pin >= 0) {
530 /* already on, turn off first */
531 lan743x_ptp_perout_off(adapter, index);
532 }
533
534 perout->event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
535
536 if (perout->event_ch < 0) {
537 netif_warn(adapter, drv, adapter->netdev,
538 "Failed to reserve event channel %d for PEROUT\n",
539 index);
540 ret = -EBUSY;
541 goto failed;
542 }
543
544 perout->gpio_pin = lan743x_gpio_rsrv_ptp_out(adapter,
545 perout_pin,
546 perout->event_ch);
547
548 if (perout->gpio_pin < 0) {
549 netif_warn(adapter, drv, adapter->netdev,
550 "Failed to reserve gpio %d for PEROUT\n",
551 perout_pin);
552 ret = -EBUSY;
553 goto failed;
554 }
555
556 start_sec = perout_request->start.sec;
557 start_sec += perout_request->start.nsec / 1000000000;
558 start_nsec = perout_request->start.nsec % 1000000000;
559
560 period_sec = perout_request->period.sec;
561 period_sec += perout_request->period.nsec / 1000000000;
562 period_nsec = perout_request->period.nsec % 1000000000;
563
564 if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) {
565 struct timespec64 ts_on, ts_period;
566 s64 wf_high, period64, half;
567 s32 reminder;
568
569 ts_on.tv_sec = perout_request->on.sec;
570 ts_on.tv_nsec = perout_request->on.nsec;
571 wf_high = timespec64_to_ns(&ts_on);
572 ts_period.tv_sec = perout_request->period.sec;
573 ts_period.tv_nsec = perout_request->period.nsec;
574 period64 = timespec64_to_ns(&ts_period);
575
576 if (period64 < 200) {
577 netif_warn(adapter, drv, adapter->netdev,
578 "perout period too small, minimum is 200nS\n");
579 ret = -EOPNOTSUPP;
580 goto failed;
581 }
582 if (wf_high >= period64) {
583 netif_warn(adapter, drv, adapter->netdev,
584 "pulse width must be smaller than period\n");
585 ret = -EINVAL;
586 goto failed;
587 }
588
589 /* Check if we can do 50% toggle on an even value of period.
590 * If the period number is odd, then check if the requested
591 * pulse width is the same as one of pre-defined width values.
592 * Otherwise, return failure.
593 */
594 half = div_s64_rem(period64, 2, &reminder);
595 if (!reminder) {
596 if (half == wf_high) {
597 /* It's 50% match. Use the toggle option */
598 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_TOGGLE_;
599 /* In this case, devide period value by 2 */
600 ts_period = ns_to_timespec64(div_s64(period64, 2));
601 period_sec = ts_period.tv_sec;
602 period_nsec = ts_period.tv_nsec;
603
604 goto program;
605 }
606 }
607 /* if we can't do toggle, then the width option needs to be the exact match */
608 if (wf_high == 200000000) {
609 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
610 } else if (wf_high == 10000000) {
611 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
612 } else if (wf_high == 1000000) {
613 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
614 } else if (wf_high == 100000) {
615 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
616 } else if (wf_high == 10000) {
617 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
618 } else if (wf_high == 100) {
619 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
620 } else {
621 netif_warn(adapter, drv, adapter->netdev,
622 "duty cycle specified is not supported\n");
623 ret = -EOPNOTSUPP;
624 goto failed;
625 }
626 } else {
627 if (period_sec == 0) {
628 if (period_nsec >= 400000000) {
629 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
630 } else if (period_nsec >= 20000000) {
631 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
632 } else if (period_nsec >= 2000000) {
633 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
634 } else if (period_nsec >= 200000) {
635 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
636 } else if (period_nsec >= 20000) {
637 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
638 } else if (period_nsec >= 200) {
639 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
640 } else {
641 netif_warn(adapter, drv, adapter->netdev,
642 "perout period too small, minimum is 200nS\n");
643 ret = -EOPNOTSUPP;
644 goto failed;
645 }
646 } else {
647 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
648 }
649 }
650 program:
651
652 /* turn off by setting target far in future */
653 lan743x_csr_write(adapter,
654 PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
655 0xFFFF0000);
656 lan743x_csr_write(adapter,
657 PTP_CLOCK_TARGET_NS_X(perout->event_ch), 0);
658
659 /* Configure to pulse every period */
660 general_config = lan743x_csr_read(adapter, PTP_GENERAL_CONFIG);
661 general_config &= ~(PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
662 (perout->event_ch));
663 general_config |= PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
664 (perout->event_ch, pulse_width);
665 general_config &= ~PTP_GENERAL_CONFIG_RELOAD_ADD_X_
666 (perout->event_ch);
667 lan743x_csr_write(adapter, PTP_GENERAL_CONFIG, general_config);
668
669 /* set the reload to one toggle cycle */
670 lan743x_csr_write(adapter,
671 PTP_CLOCK_TARGET_RELOAD_SEC_X(perout->event_ch),
672 period_sec);
673 lan743x_csr_write(adapter,
674 PTP_CLOCK_TARGET_RELOAD_NS_X(perout->event_ch),
675 period_nsec);
676
677 /* set the start time */
678 lan743x_csr_write(adapter,
679 PTP_CLOCK_TARGET_SEC_X(perout->event_ch),
680 start_sec);
681 lan743x_csr_write(adapter,
682 PTP_CLOCK_TARGET_NS_X(perout->event_ch),
683 start_nsec);
684
685 return 0;
686
687 failed:
688 lan743x_ptp_perout_off(adapter, index);
689 return ret;
690 }
691
lan743x_ptp_io_perout_off(struct lan743x_adapter * adapter,u32 index)692 static void lan743x_ptp_io_perout_off(struct lan743x_adapter *adapter,
693 u32 index)
694 {
695 struct lan743x_ptp *ptp = &adapter->ptp;
696 int perout_pin;
697 int event_ch;
698 u32 gen_cfg;
699 int val;
700
701 event_ch = ptp->ptp_io_perout[index];
702 if (event_ch >= 0) {
703 /* set target to far in the future, effectively disabling it */
704 lan743x_csr_write(adapter,
705 PTP_CLOCK_TARGET_SEC_X(event_ch),
706 0xFFFF0000);
707 lan743x_csr_write(adapter,
708 PTP_CLOCK_TARGET_NS_X(event_ch),
709 0);
710
711 gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG);
712 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_
713 (event_ch));
714 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch));
715 gen_cfg |= HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch);
716 lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg);
717 if (event_ch)
718 lan743x_csr_write(adapter, PTP_INT_STS,
719 PTP_INT_TIMER_INT_B_);
720 else
721 lan743x_csr_write(adapter, PTP_INT_STS,
722 PTP_INT_TIMER_INT_A_);
723 lan743x_ptp_release_event_ch(adapter, event_ch);
724 ptp->ptp_io_perout[index] = -1;
725 }
726
727 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index);
728
729 /* Deselect Event output */
730 val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG);
731
732 /* Disables the output of Local Time Target compare events */
733 val &= ~PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin);
734 lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val);
735
736 /* Configured as an opendrain driver*/
737 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
738 val &= ~PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin);
739 lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val);
740 /* Dummy read to make sure write operation success */
741 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
742 }
743
lan743x_ptp_io_perout(struct lan743x_adapter * adapter,int on,struct ptp_perout_request * perout_request)744 static int lan743x_ptp_io_perout(struct lan743x_adapter *adapter, int on,
745 struct ptp_perout_request *perout_request)
746 {
747 struct lan743x_ptp *ptp = &adapter->ptp;
748 u32 period_sec, period_nsec;
749 u32 start_sec, start_nsec;
750 u32 pulse_sec, pulse_nsec;
751 int pulse_width;
752 int perout_pin;
753 int event_ch;
754 u32 gen_cfg;
755 u32 index;
756 int val;
757
758 index = perout_request->index;
759 event_ch = ptp->ptp_io_perout[index];
760
761 if (on) {
762 perout_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_PEROUT, index);
763 if (perout_pin < 0)
764 return -EBUSY;
765 } else {
766 lan743x_ptp_io_perout_off(adapter, index);
767 return 0;
768 }
769
770 if (event_ch >= LAN743X_PTP_N_EVENT_CHAN) {
771 /* already on, turn off first */
772 lan743x_ptp_io_perout_off(adapter, index);
773 }
774
775 event_ch = lan743x_ptp_reserve_event_ch(adapter, index);
776 if (event_ch < 0) {
777 netif_warn(adapter, drv, adapter->netdev,
778 "Failed to reserve event channel %d for PEROUT\n",
779 index);
780 goto failed;
781 }
782 ptp->ptp_io_perout[index] = event_ch;
783
784 if (perout_request->flags & PTP_PEROUT_DUTY_CYCLE) {
785 pulse_sec = perout_request->on.sec;
786 pulse_sec += perout_request->on.nsec / 1000000000;
787 pulse_nsec = perout_request->on.nsec % 1000000000;
788 } else {
789 pulse_sec = perout_request->period.sec;
790 pulse_sec += perout_request->period.nsec / 1000000000;
791 pulse_nsec = perout_request->period.nsec % 1000000000;
792 }
793
794 if (pulse_sec == 0) {
795 if (pulse_nsec >= 400000000) {
796 pulse_width = PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
797 } else if (pulse_nsec >= 200000000) {
798 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100MS_;
799 } else if (pulse_nsec >= 100000000) {
800 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50MS_;
801 } else if (pulse_nsec >= 20000000) {
802 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10MS_;
803 } else if (pulse_nsec >= 10000000) {
804 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5MS_;
805 } else if (pulse_nsec >= 2000000) {
806 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1MS_;
807 } else if (pulse_nsec >= 1000000) {
808 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500US_;
809 } else if (pulse_nsec >= 200000) {
810 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100US_;
811 } else if (pulse_nsec >= 100000) {
812 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_50US_;
813 } else if (pulse_nsec >= 20000) {
814 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_10US_;
815 } else if (pulse_nsec >= 10000) {
816 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_5US_;
817 } else if (pulse_nsec >= 2000) {
818 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_1US_;
819 } else if (pulse_nsec >= 1000) {
820 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_500NS_;
821 } else if (pulse_nsec >= 200) {
822 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_100NS_;
823 } else {
824 netif_warn(adapter, drv, adapter->netdev,
825 "perout period too small, min is 200nS\n");
826 goto failed;
827 }
828 } else {
829 pulse_width = HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_200MS_;
830 }
831
832 /* turn off by setting target far in future */
833 lan743x_csr_write(adapter,
834 PTP_CLOCK_TARGET_SEC_X(event_ch),
835 0xFFFF0000);
836 lan743x_csr_write(adapter,
837 PTP_CLOCK_TARGET_NS_X(event_ch), 0);
838
839 /* Configure to pulse every period */
840 gen_cfg = lan743x_csr_read(adapter, HS_PTP_GENERAL_CONFIG);
841 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_MASK_(event_ch));
842 gen_cfg |= HS_PTP_GENERAL_CONFIG_CLOCK_EVENT_X_SET_
843 (event_ch, pulse_width);
844 gen_cfg |= HS_PTP_GENERAL_CONFIG_EVENT_POL_X_(event_ch);
845 gen_cfg &= ~(HS_PTP_GENERAL_CONFIG_RELOAD_ADD_X_(event_ch));
846 lan743x_csr_write(adapter, HS_PTP_GENERAL_CONFIG, gen_cfg);
847
848 /* set the reload to one toggle cycle */
849 period_sec = perout_request->period.sec;
850 period_sec += perout_request->period.nsec / 1000000000;
851 period_nsec = perout_request->period.nsec % 1000000000;
852 lan743x_csr_write(adapter,
853 PTP_CLOCK_TARGET_RELOAD_SEC_X(event_ch),
854 period_sec);
855 lan743x_csr_write(adapter,
856 PTP_CLOCK_TARGET_RELOAD_NS_X(event_ch),
857 period_nsec);
858
859 start_sec = perout_request->start.sec;
860 start_sec += perout_request->start.nsec / 1000000000;
861 start_nsec = perout_request->start.nsec % 1000000000;
862
863 /* set the start time */
864 lan743x_csr_write(adapter,
865 PTP_CLOCK_TARGET_SEC_X(event_ch),
866 start_sec);
867 lan743x_csr_write(adapter,
868 PTP_CLOCK_TARGET_NS_X(event_ch),
869 start_nsec);
870
871 /* Enable LTC Target Read */
872 val = lan743x_csr_read(adapter, PTP_CMD_CTL);
873 val |= PTP_CMD_CTL_PTP_LTC_TARGET_READ_;
874 lan743x_csr_write(adapter, PTP_CMD_CTL, val);
875
876 /* Configure as an push/pull driver */
877 val = lan743x_csr_read(adapter, PTP_IO_PIN_CFG);
878 val |= PTP_IO_PIN_CFG_OBUF_TYPE_(perout_pin);
879 lan743x_csr_write(adapter, PTP_IO_PIN_CFG, val);
880
881 /* Select Event output */
882 val = lan743x_csr_read(adapter, PTP_IO_EVENT_OUTPUT_CFG);
883 if (event_ch)
884 /* Channel B as the output */
885 val |= PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin);
886 else
887 /* Channel A as the output */
888 val &= ~PTP_IO_EVENT_OUTPUT_CFG_SEL_(perout_pin);
889
890 /* Enables the output of Local Time Target compare events */
891 val |= PTP_IO_EVENT_OUTPUT_CFG_EN_(perout_pin);
892 lan743x_csr_write(adapter, PTP_IO_EVENT_OUTPUT_CFG, val);
893
894 return 0;
895
896 failed:
897 lan743x_ptp_io_perout_off(adapter, index);
898 return -ENODEV;
899 }
900
lan743x_ptp_io_extts_off(struct lan743x_adapter * adapter,u32 index)901 static void lan743x_ptp_io_extts_off(struct lan743x_adapter *adapter,
902 u32 index)
903 {
904 struct lan743x_ptp *ptp = &adapter->ptp;
905 struct lan743x_extts *extts;
906 int val;
907
908 extts = &ptp->extts[index];
909 /* PTP Interrupt Enable Clear Register */
910 if (extts->flags & PTP_FALLING_EDGE)
911 val = PTP_INT_EN_FE_EN_CLR_(index);
912 else
913 val = PTP_INT_EN_RE_EN_CLR_(index);
914 lan743x_csr_write(adapter, PTP_INT_EN_CLR, val);
915
916 /* Disables PTP-IO edge lock */
917 val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG);
918 if (extts->flags & PTP_FALLING_EDGE) {
919 val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(index);
920 val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(index);
921 } else {
922 val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(index);
923 val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(index);
924 }
925 lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val);
926
927 /* PTP-IO De-select register */
928 val = lan743x_csr_read(adapter, PTP_IO_SEL);
929 val &= ~PTP_IO_SEL_MASK_;
930 lan743x_csr_write(adapter, PTP_IO_SEL, val);
931
932 /* Clear timestamp */
933 memset(&extts->ts, 0, sizeof(struct timespec64));
934 extts->flags = 0;
935 }
936
lan743x_ptp_io_event_cap_en(struct lan743x_adapter * adapter,u32 flags,u32 channel)937 static int lan743x_ptp_io_event_cap_en(struct lan743x_adapter *adapter,
938 u32 flags, u32 channel)
939 {
940 struct lan743x_ptp *ptp = &adapter->ptp;
941 int val;
942
943 if ((flags & PTP_EXTTS_EDGES) == PTP_EXTTS_EDGES)
944 return -EOPNOTSUPP;
945
946 mutex_lock(&ptp->command_lock);
947 /* PTP-IO Event Capture Enable */
948 val = lan743x_csr_read(adapter, PTP_IO_CAP_CONFIG);
949 if (flags & PTP_FALLING_EDGE) {
950 val &= ~PTP_IO_CAP_CONFIG_LOCK_RE_(channel);
951 val &= ~PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel);
952 val |= PTP_IO_CAP_CONFIG_LOCK_FE_(channel);
953 val |= PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel);
954 } else {
955 /* Rising eventing as Default */
956 val &= ~PTP_IO_CAP_CONFIG_LOCK_FE_(channel);
957 val &= ~PTP_IO_CAP_CONFIG_FE_CAP_EN_(channel);
958 val |= PTP_IO_CAP_CONFIG_LOCK_RE_(channel);
959 val |= PTP_IO_CAP_CONFIG_RE_CAP_EN_(channel);
960 }
961 lan743x_csr_write(adapter, PTP_IO_CAP_CONFIG, val);
962
963 /* PTP-IO Select */
964 val = lan743x_csr_read(adapter, PTP_IO_SEL);
965 val &= ~PTP_IO_SEL_MASK_;
966 val |= channel << PTP_IO_SEL_SHIFT_;
967 lan743x_csr_write(adapter, PTP_IO_SEL, val);
968
969 /* PTP Interrupt Enable Register */
970 if (flags & PTP_FALLING_EDGE)
971 val = PTP_INT_EN_FE_EN_SET_(channel);
972 else
973 val = PTP_INT_EN_RE_EN_SET_(channel);
974 lan743x_csr_write(adapter, PTP_INT_EN_SET, val);
975
976 mutex_unlock(&ptp->command_lock);
977
978 return 0;
979 }
980
lan743x_ptp_io_extts(struct lan743x_adapter * adapter,int on,struct ptp_extts_request * extts_request)981 static int lan743x_ptp_io_extts(struct lan743x_adapter *adapter, int on,
982 struct ptp_extts_request *extts_request)
983 {
984 struct lan743x_ptp *ptp = &adapter->ptp;
985 u32 flags = extts_request->flags;
986 u32 index = extts_request->index;
987 struct lan743x_extts *extts;
988 int extts_pin;
989 int ret = 0;
990
991 extts = &ptp->extts[index];
992
993 if (on) {
994 extts_pin = ptp_find_pin(ptp->ptp_clock, PTP_PF_EXTTS, index);
995 if (extts_pin < 0)
996 return -EBUSY;
997
998 ret = lan743x_ptp_io_event_cap_en(adapter, flags, index);
999 if (!ret)
1000 extts->flags = flags;
1001 } else {
1002 lan743x_ptp_io_extts_off(adapter, index);
1003 }
1004
1005 return ret;
1006 }
1007
lan743x_ptpci_enable(struct ptp_clock_info * ptpci,struct ptp_clock_request * request,int on)1008 static int lan743x_ptpci_enable(struct ptp_clock_info *ptpci,
1009 struct ptp_clock_request *request, int on)
1010 {
1011 struct lan743x_ptp *ptp =
1012 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
1013 struct lan743x_adapter *adapter =
1014 container_of(ptp, struct lan743x_adapter, ptp);
1015
1016 if (request) {
1017 switch (request->type) {
1018 case PTP_CLK_REQ_EXTTS:
1019 if (request->extts.index < ptpci->n_ext_ts)
1020 return lan743x_ptp_io_extts(adapter, on,
1021 &request->extts);
1022 return -EINVAL;
1023 case PTP_CLK_REQ_PEROUT:
1024 if (request->perout.index < ptpci->n_per_out) {
1025 if (adapter->is_pci11x1x)
1026 return lan743x_ptp_io_perout(adapter, on,
1027 &request->perout);
1028 else
1029 return lan743x_ptp_perout(adapter, on,
1030 &request->perout);
1031 }
1032 return -EINVAL;
1033 case PTP_CLK_REQ_PPS:
1034 return -EINVAL;
1035 default:
1036 netif_err(adapter, drv, adapter->netdev,
1037 "request->type == %d, Unknown\n",
1038 request->type);
1039 break;
1040 }
1041 } else {
1042 netif_err(adapter, drv, adapter->netdev, "request == NULL\n");
1043 }
1044 return 0;
1045 }
1046
lan743x_ptpci_verify_pin_config(struct ptp_clock_info * ptp,unsigned int pin,enum ptp_pin_function func,unsigned int chan)1047 static int lan743x_ptpci_verify_pin_config(struct ptp_clock_info *ptp,
1048 unsigned int pin,
1049 enum ptp_pin_function func,
1050 unsigned int chan)
1051 {
1052 int result = 0;
1053
1054 /* Confirm the requested function is supported. Parameter
1055 * validation is done by the caller.
1056 */
1057 switch (func) {
1058 case PTP_PF_NONE:
1059 case PTP_PF_PEROUT:
1060 case PTP_PF_EXTTS:
1061 break;
1062 case PTP_PF_PHYSYNC:
1063 default:
1064 result = -1;
1065 break;
1066 }
1067 return result;
1068 }
1069
lan743x_ptp_io_event_clock_get(struct lan743x_adapter * adapter,bool fe,u8 channel,struct timespec64 * ts)1070 static void lan743x_ptp_io_event_clock_get(struct lan743x_adapter *adapter,
1071 bool fe, u8 channel,
1072 struct timespec64 *ts)
1073 {
1074 struct lan743x_ptp *ptp = &adapter->ptp;
1075 struct lan743x_extts *extts;
1076 u32 sec, nsec;
1077
1078 mutex_lock(&ptp->command_lock);
1079 if (fe) {
1080 sec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_SEC_CAP_X);
1081 nsec = lan743x_csr_read(adapter, PTP_IO_FE_LTC_NS_CAP_X);
1082 } else {
1083 sec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_SEC_CAP_X);
1084 nsec = lan743x_csr_read(adapter, PTP_IO_RE_LTC_NS_CAP_X);
1085 }
1086
1087 mutex_unlock(&ptp->command_lock);
1088
1089 /* Update Local timestamp */
1090 extts = &ptp->extts[channel];
1091 extts->ts.tv_sec = sec;
1092 extts->ts.tv_nsec = nsec;
1093 ts->tv_sec = sec;
1094 ts->tv_nsec = nsec;
1095 }
1096
lan743x_ptpci_do_aux_work(struct ptp_clock_info * ptpci)1097 static long lan743x_ptpci_do_aux_work(struct ptp_clock_info *ptpci)
1098 {
1099 struct lan743x_ptp *ptp =
1100 container_of(ptpci, struct lan743x_ptp, ptp_clock_info);
1101 struct lan743x_adapter *adapter =
1102 container_of(ptp, struct lan743x_adapter, ptp);
1103 u32 cap_info, cause, header, nsec, seconds;
1104 bool new_timestamp_available = false;
1105 struct ptp_clock_event ptp_event;
1106 struct timespec64 ts;
1107 int ptp_int_sts;
1108 int count = 0;
1109 int channel;
1110 s64 ns;
1111
1112 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
1113 while ((count < 100) && ptp_int_sts) {
1114 count++;
1115
1116 if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
1117 cap_info = lan743x_csr_read(adapter, PTP_CAP_INFO);
1118
1119 if (PTP_CAP_INFO_TX_TS_CNT_GET_(cap_info) > 0) {
1120 seconds = lan743x_csr_read(adapter,
1121 PTP_TX_EGRESS_SEC);
1122 nsec = lan743x_csr_read(adapter,
1123 PTP_TX_EGRESS_NS);
1124 cause = (nsec &
1125 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_MASK_);
1126 header = lan743x_csr_read(adapter,
1127 PTP_TX_MSG_HEADER);
1128
1129 if (cause ==
1130 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_SW_) {
1131 nsec &= PTP_TX_EGRESS_NS_TS_NS_MASK_;
1132 lan743x_ptp_tx_ts_enqueue_ts(adapter,
1133 seconds,
1134 nsec,
1135 header);
1136 new_timestamp_available = true;
1137 } else if (cause ==
1138 PTP_TX_EGRESS_NS_CAPTURE_CAUSE_AUTO_) {
1139 netif_err(adapter, drv, adapter->netdev,
1140 "Auto capture cause not supported\n");
1141 } else {
1142 netif_warn(adapter, drv, adapter->netdev,
1143 "unknown tx timestamp capture cause\n");
1144 }
1145 } else {
1146 netif_warn(adapter, drv, adapter->netdev,
1147 "TX TS INT but no TX TS CNT\n");
1148 }
1149 lan743x_csr_write(adapter, PTP_INT_STS,
1150 PTP_INT_BIT_TX_TS_);
1151 }
1152
1153 if (ptp_int_sts & PTP_INT_IO_FE_MASK_) {
1154 do {
1155 channel = lan743x_get_channel((ptp_int_sts &
1156 PTP_INT_IO_FE_MASK_) >>
1157 PTP_INT_IO_FE_SHIFT_);
1158 if (channel >= 0 &&
1159 channel < PCI11X1X_PTP_IO_MAX_CHANNELS) {
1160 lan743x_ptp_io_event_clock_get(adapter,
1161 true,
1162 channel,
1163 &ts);
1164 /* PTP Falling Event post */
1165 ns = timespec64_to_ns(&ts);
1166 ptp_event.timestamp = ns;
1167 ptp_event.index = channel;
1168 ptp_event.type = PTP_CLOCK_EXTTS;
1169 ptp_clock_event(ptp->ptp_clock,
1170 &ptp_event);
1171 lan743x_csr_write(adapter, PTP_INT_STS,
1172 PTP_INT_IO_FE_SET_
1173 (channel));
1174 ptp_int_sts &= ~(1 <<
1175 (PTP_INT_IO_FE_SHIFT_ +
1176 channel));
1177 } else {
1178 /* Clear falling event interrupts */
1179 lan743x_csr_write(adapter, PTP_INT_STS,
1180 PTP_INT_IO_FE_MASK_);
1181 ptp_int_sts &= ~PTP_INT_IO_FE_MASK_;
1182 }
1183 } while (ptp_int_sts & PTP_INT_IO_FE_MASK_);
1184 }
1185
1186 if (ptp_int_sts & PTP_INT_IO_RE_MASK_) {
1187 do {
1188 channel = lan743x_get_channel((ptp_int_sts &
1189 PTP_INT_IO_RE_MASK_) >>
1190 PTP_INT_IO_RE_SHIFT_);
1191 if (channel >= 0 &&
1192 channel < PCI11X1X_PTP_IO_MAX_CHANNELS) {
1193 lan743x_ptp_io_event_clock_get(adapter,
1194 false,
1195 channel,
1196 &ts);
1197 /* PTP Rising Event post */
1198 ns = timespec64_to_ns(&ts);
1199 ptp_event.timestamp = ns;
1200 ptp_event.index = channel;
1201 ptp_event.type = PTP_CLOCK_EXTTS;
1202 ptp_clock_event(ptp->ptp_clock,
1203 &ptp_event);
1204 lan743x_csr_write(adapter, PTP_INT_STS,
1205 PTP_INT_IO_RE_SET_
1206 (channel));
1207 ptp_int_sts &= ~(1 <<
1208 (PTP_INT_IO_RE_SHIFT_ +
1209 channel));
1210 } else {
1211 /* Clear Rising event interrupt */
1212 lan743x_csr_write(adapter, PTP_INT_STS,
1213 PTP_INT_IO_RE_MASK_);
1214 ptp_int_sts &= ~PTP_INT_IO_RE_MASK_;
1215 }
1216 } while (ptp_int_sts & PTP_INT_IO_RE_MASK_);
1217 }
1218
1219 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
1220 }
1221
1222 if (new_timestamp_available)
1223 lan743x_ptp_tx_ts_complete(adapter);
1224
1225 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
1226
1227 return -1;
1228 }
1229
lan743x_ptp_clock_get(struct lan743x_adapter * adapter,u32 * seconds,u32 * nano_seconds,u32 * sub_nano_seconds)1230 static void lan743x_ptp_clock_get(struct lan743x_adapter *adapter,
1231 u32 *seconds, u32 *nano_seconds,
1232 u32 *sub_nano_seconds)
1233 {
1234 struct lan743x_ptp *ptp = &adapter->ptp;
1235
1236 mutex_lock(&ptp->command_lock);
1237
1238 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
1239 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
1240
1241 if (seconds)
1242 (*seconds) = lan743x_csr_read(adapter, PTP_CLOCK_SEC);
1243
1244 if (nano_seconds)
1245 (*nano_seconds) = lan743x_csr_read(adapter, PTP_CLOCK_NS);
1246
1247 if (sub_nano_seconds)
1248 (*sub_nano_seconds) =
1249 lan743x_csr_read(adapter, PTP_CLOCK_SUBNS);
1250
1251 mutex_unlock(&ptp->command_lock);
1252 }
1253
lan743x_ptp_io_clock_get(struct lan743x_adapter * adapter,u32 * sec,u32 * nsec,u32 * sub_nsec)1254 static void lan743x_ptp_io_clock_get(struct lan743x_adapter *adapter,
1255 u32 *sec, u32 *nsec, u32 *sub_nsec)
1256 {
1257 struct lan743x_ptp *ptp = &adapter->ptp;
1258
1259 mutex_lock(&ptp->command_lock);
1260 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_READ_);
1261 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_READ_);
1262
1263 if (sec)
1264 (*sec) = lan743x_csr_read(adapter, PTP_LTC_RD_SEC_LO);
1265
1266 if (nsec)
1267 (*nsec) = lan743x_csr_read(adapter, PTP_LTC_RD_NS);
1268
1269 if (sub_nsec)
1270 (*sub_nsec) =
1271 lan743x_csr_read(adapter, PTP_LTC_RD_SUBNS);
1272
1273 mutex_unlock(&ptp->command_lock);
1274 }
1275
lan743x_ptp_clock_step(struct lan743x_adapter * adapter,s64 time_step_ns)1276 static void lan743x_ptp_clock_step(struct lan743x_adapter *adapter,
1277 s64 time_step_ns)
1278 {
1279 struct lan743x_ptp *ptp = &adapter->ptp;
1280 u32 nano_seconds_step = 0;
1281 u64 abs_time_step_ns = 0;
1282 u32 unsigned_seconds = 0;
1283 u32 nano_seconds = 0;
1284 u32 remainder = 0;
1285 s32 seconds = 0;
1286
1287 if (time_step_ns > 15000000000LL) {
1288 /* convert to clock set */
1289 if (adapter->is_pci11x1x)
1290 lan743x_ptp_io_clock_get(adapter, &unsigned_seconds,
1291 &nano_seconds, NULL);
1292 else
1293 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
1294 &nano_seconds, NULL);
1295 unsigned_seconds += div_u64_rem(time_step_ns, 1000000000LL,
1296 &remainder);
1297 nano_seconds += remainder;
1298 if (nano_seconds >= 1000000000) {
1299 unsigned_seconds++;
1300 nano_seconds -= 1000000000;
1301 }
1302 lan743x_ptp_clock_set(adapter, unsigned_seconds,
1303 nano_seconds, 0);
1304 return;
1305 } else if (time_step_ns < -15000000000LL) {
1306 /* convert to clock set */
1307 time_step_ns = -time_step_ns;
1308
1309 if (adapter->is_pci11x1x) {
1310 lan743x_ptp_io_clock_get(adapter, &unsigned_seconds,
1311 &nano_seconds, NULL);
1312 } else {
1313 lan743x_ptp_clock_get(adapter, &unsigned_seconds,
1314 &nano_seconds, NULL);
1315 }
1316 unsigned_seconds -= div_u64_rem(time_step_ns, 1000000000LL,
1317 &remainder);
1318 nano_seconds_step = remainder;
1319 if (nano_seconds < nano_seconds_step) {
1320 unsigned_seconds--;
1321 nano_seconds += 1000000000;
1322 }
1323 nano_seconds -= nano_seconds_step;
1324 lan743x_ptp_clock_set(adapter, unsigned_seconds,
1325 nano_seconds, 0);
1326 return;
1327 }
1328
1329 /* do clock step */
1330 if (time_step_ns >= 0) {
1331 abs_time_step_ns = (u64)(time_step_ns);
1332 seconds = (s32)div_u64_rem(abs_time_step_ns, 1000000000,
1333 &remainder);
1334 nano_seconds = (u32)remainder;
1335 } else {
1336 abs_time_step_ns = (u64)(-time_step_ns);
1337 seconds = -((s32)div_u64_rem(abs_time_step_ns, 1000000000,
1338 &remainder));
1339 nano_seconds = (u32)remainder;
1340 if (nano_seconds > 0) {
1341 /* subtracting nano seconds is not allowed
1342 * convert to subtracting from seconds,
1343 * and adding to nanoseconds
1344 */
1345 seconds--;
1346 nano_seconds = (1000000000 - nano_seconds);
1347 }
1348 }
1349
1350 if (nano_seconds > 0) {
1351 /* add 8 ns to cover the likely normal increment */
1352 nano_seconds += 8;
1353 }
1354
1355 if (nano_seconds >= 1000000000) {
1356 /* carry into seconds */
1357 seconds++;
1358 nano_seconds -= 1000000000;
1359 }
1360
1361 while (seconds) {
1362 mutex_lock(&ptp->command_lock);
1363 if (seconds > 0) {
1364 u32 adjustment_value = (u32)seconds;
1365
1366 if (adjustment_value > 0xF)
1367 adjustment_value = 0xF;
1368 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
1369 PTP_CLOCK_STEP_ADJ_DIR_ |
1370 adjustment_value);
1371 seconds -= ((s32)adjustment_value);
1372 } else {
1373 u32 adjustment_value = (u32)(-seconds);
1374
1375 if (adjustment_value > 0xF)
1376 adjustment_value = 0xF;
1377 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
1378 adjustment_value);
1379 seconds += ((s32)adjustment_value);
1380 }
1381 lan743x_csr_write(adapter, PTP_CMD_CTL,
1382 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
1383 lan743x_ptp_wait_till_cmd_done(adapter,
1384 PTP_CMD_CTL_PTP_CLOCK_STEP_SEC_);
1385 mutex_unlock(&ptp->command_lock);
1386 }
1387 if (nano_seconds) {
1388 mutex_lock(&ptp->command_lock);
1389 lan743x_csr_write(adapter, PTP_CLOCK_STEP_ADJ,
1390 PTP_CLOCK_STEP_ADJ_DIR_ |
1391 (nano_seconds &
1392 PTP_CLOCK_STEP_ADJ_VALUE_MASK_));
1393 lan743x_csr_write(adapter, PTP_CMD_CTL,
1394 PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
1395 lan743x_ptp_wait_till_cmd_done(adapter,
1396 PTP_CMD_CTL_PTP_CLK_STP_NSEC_);
1397 mutex_unlock(&ptp->command_lock);
1398 }
1399 }
1400
lan743x_ptp_isr(void * context)1401 void lan743x_ptp_isr(void *context)
1402 {
1403 struct lan743x_adapter *adapter = (struct lan743x_adapter *)context;
1404 struct lan743x_ptp *ptp = NULL;
1405 int enable_flag = 1;
1406 u32 ptp_int_sts = 0;
1407
1408 ptp = &adapter->ptp;
1409
1410 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
1411
1412 ptp_int_sts = lan743x_csr_read(adapter, PTP_INT_STS);
1413 ptp_int_sts &= lan743x_csr_read(adapter, PTP_INT_EN_SET);
1414
1415 if (ptp_int_sts & PTP_INT_BIT_TX_TS_) {
1416 ptp_schedule_worker(ptp->ptp_clock, 0);
1417 enable_flag = 0;/* tasklet will re-enable later */
1418 }
1419 if (ptp_int_sts & PTP_INT_BIT_TX_SWTS_ERR_) {
1420 netif_err(adapter, drv, adapter->netdev,
1421 "PTP TX Software Timestamp Error\n");
1422 /* clear int status bit */
1423 lan743x_csr_write(adapter, PTP_INT_STS,
1424 PTP_INT_BIT_TX_SWTS_ERR_);
1425 }
1426 if (ptp_int_sts & PTP_INT_BIT_TIMER_B_) {
1427 /* clear int status bit */
1428 lan743x_csr_write(adapter, PTP_INT_STS,
1429 PTP_INT_BIT_TIMER_B_);
1430 }
1431 if (ptp_int_sts & PTP_INT_BIT_TIMER_A_) {
1432 /* clear int status bit */
1433 lan743x_csr_write(adapter, PTP_INT_STS,
1434 PTP_INT_BIT_TIMER_A_);
1435 }
1436
1437 if (enable_flag) {
1438 /* re-enable isr */
1439 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
1440 }
1441 }
1442
lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter * adapter,struct sk_buff * skb,bool ignore_sync)1443 static void lan743x_ptp_tx_ts_enqueue_skb(struct lan743x_adapter *adapter,
1444 struct sk_buff *skb, bool ignore_sync)
1445 {
1446 struct lan743x_ptp *ptp = &adapter->ptp;
1447
1448 spin_lock_bh(&ptp->tx_ts_lock);
1449 if (ptp->tx_ts_skb_queue_size < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
1450 ptp->tx_ts_skb_queue[ptp->tx_ts_skb_queue_size] = skb;
1451 if (ignore_sync)
1452 ptp->tx_ts_ignore_sync_queue |=
1453 BIT(ptp->tx_ts_skb_queue_size);
1454 ptp->tx_ts_skb_queue_size++;
1455 } else {
1456 /* this should never happen, so long as the tx channel
1457 * calls and honors the result from
1458 * lan743x_ptp_request_tx_timestamp
1459 */
1460 netif_err(adapter, drv, adapter->netdev,
1461 "tx ts skb queue overflow\n");
1462 dev_kfree_skb(skb);
1463 }
1464 spin_unlock_bh(&ptp->tx_ts_lock);
1465 }
1466
lan743x_ptp_sync_to_system_clock(struct lan743x_adapter * adapter)1467 static void lan743x_ptp_sync_to_system_clock(struct lan743x_adapter *adapter)
1468 {
1469 struct timespec64 ts;
1470
1471 ktime_get_clocktai_ts64(&ts);
1472
1473 lan743x_ptp_clock_set(adapter, ts.tv_sec, ts.tv_nsec, 0);
1474 }
1475
lan743x_ptp_update_latency(struct lan743x_adapter * adapter,u32 link_speed)1476 void lan743x_ptp_update_latency(struct lan743x_adapter *adapter,
1477 u32 link_speed)
1478 {
1479 switch (link_speed) {
1480 case 10:
1481 lan743x_csr_write(adapter, PTP_LATENCY,
1482 PTP_LATENCY_TX_SET_(0) |
1483 PTP_LATENCY_RX_SET_(0));
1484 break;
1485 case 100:
1486 lan743x_csr_write(adapter, PTP_LATENCY,
1487 PTP_LATENCY_TX_SET_(181) |
1488 PTP_LATENCY_RX_SET_(594));
1489 break;
1490 case 1000:
1491 lan743x_csr_write(adapter, PTP_LATENCY,
1492 PTP_LATENCY_TX_SET_(30) |
1493 PTP_LATENCY_RX_SET_(525));
1494 break;
1495 }
1496 }
1497
lan743x_ptp_init(struct lan743x_adapter * adapter)1498 int lan743x_ptp_init(struct lan743x_adapter *adapter)
1499 {
1500 struct lan743x_ptp *ptp = &adapter->ptp;
1501 int i;
1502
1503 mutex_init(&ptp->command_lock);
1504 spin_lock_init(&ptp->tx_ts_lock);
1505 ptp->used_event_ch = 0;
1506
1507 for (i = 0; i < LAN743X_PTP_N_EVENT_CHAN; i++) {
1508 ptp->perout[i].event_ch = -1;
1509 ptp->perout[i].gpio_pin = -1;
1510 }
1511
1512 lan743x_led_mux_save(adapter);
1513
1514 return 0;
1515 }
1516
lan743x_ptp_open(struct lan743x_adapter * adapter)1517 int lan743x_ptp_open(struct lan743x_adapter *adapter)
1518 {
1519 struct lan743x_ptp *ptp = &adapter->ptp;
1520 int ret = -ENODEV;
1521 u32 temp;
1522 int i;
1523 int n_pins;
1524
1525 lan743x_ptp_reset(adapter);
1526 lan743x_ptp_sync_to_system_clock(adapter);
1527 temp = lan743x_csr_read(adapter, PTP_TX_MOD2);
1528 temp |= PTP_TX_MOD2_TX_PTP_CLR_UDPV4_CHKSUM_;
1529 lan743x_csr_write(adapter, PTP_TX_MOD2, temp);
1530 lan743x_ptp_enable(adapter);
1531 lan743x_csr_write(adapter, INT_EN_SET, INT_BIT_1588_);
1532 lan743x_csr_write(adapter, PTP_INT_EN_SET,
1533 PTP_INT_BIT_TX_SWTS_ERR_ | PTP_INT_BIT_TX_TS_);
1534 ptp->flags |= PTP_FLAG_ISR_ENABLED;
1535
1536 if (!IS_ENABLED(CONFIG_PTP_1588_CLOCK))
1537 return 0;
1538
1539 switch (adapter->csr.id_rev & ID_REV_ID_MASK_) {
1540 case ID_REV_ID_LAN7430_:
1541 n_pins = LAN7430_N_GPIO;
1542 break;
1543 case ID_REV_ID_LAN7431_:
1544 case ID_REV_ID_A011_:
1545 case ID_REV_ID_A041_:
1546 n_pins = LAN7431_N_GPIO;
1547 break;
1548 default:
1549 netif_warn(adapter, drv, adapter->netdev,
1550 "Unknown LAN743x (%08x). Assuming no GPIO\n",
1551 adapter->csr.id_rev);
1552 n_pins = 0;
1553 break;
1554 }
1555
1556 if (n_pins > LAN743X_PTP_N_GPIO)
1557 n_pins = LAN743X_PTP_N_GPIO;
1558
1559 for (i = 0; i < n_pins; i++) {
1560 struct ptp_pin_desc *ptp_pin = &ptp->pin_config[i];
1561
1562 snprintf(ptp_pin->name,
1563 sizeof(ptp_pin->name), "lan743x_ptp_pin_%02d", i);
1564 ptp_pin->index = i;
1565 ptp_pin->func = PTP_PF_NONE;
1566 }
1567
1568 ptp->ptp_clock_info.owner = THIS_MODULE;
1569 snprintf(ptp->ptp_clock_info.name, 16, "%pm",
1570 adapter->netdev->dev_addr);
1571 ptp->ptp_clock_info.max_adj = LAN743X_PTP_MAX_FREQ_ADJ_IN_PPB;
1572 ptp->ptp_clock_info.n_alarm = 0;
1573 ptp->ptp_clock_info.n_ext_ts = LAN743X_PTP_N_EXTTS;
1574 ptp->ptp_clock_info.n_per_out = LAN743X_PTP_N_EVENT_CHAN;
1575 ptp->ptp_clock_info.n_pins = n_pins;
1576 ptp->ptp_clock_info.pps = LAN743X_PTP_N_PPS;
1577 ptp->ptp_clock_info.pin_config = ptp->pin_config;
1578 ptp->ptp_clock_info.adjfine = lan743x_ptpci_adjfine;
1579 ptp->ptp_clock_info.adjfreq = lan743x_ptpci_adjfreq;
1580 ptp->ptp_clock_info.adjtime = lan743x_ptpci_adjtime;
1581 ptp->ptp_clock_info.gettime64 = lan743x_ptpci_gettime64;
1582 ptp->ptp_clock_info.getcrosststamp = NULL;
1583 ptp->ptp_clock_info.settime64 = lan743x_ptpci_settime64;
1584 ptp->ptp_clock_info.enable = lan743x_ptpci_enable;
1585 ptp->ptp_clock_info.do_aux_work = lan743x_ptpci_do_aux_work;
1586 ptp->ptp_clock_info.verify = lan743x_ptpci_verify_pin_config;
1587
1588 ptp->ptp_clock = ptp_clock_register(&ptp->ptp_clock_info,
1589 &adapter->pdev->dev);
1590
1591 if (IS_ERR(ptp->ptp_clock)) {
1592 netif_err(adapter, ifup, adapter->netdev,
1593 "ptp_clock_register failed\n");
1594 goto done;
1595 }
1596 ptp->flags |= PTP_FLAG_PTP_CLOCK_REGISTERED;
1597 netif_info(adapter, ifup, adapter->netdev,
1598 "successfully registered ptp clock\n");
1599
1600 return 0;
1601 done:
1602 lan743x_ptp_close(adapter);
1603 return ret;
1604 }
1605
lan743x_ptp_close(struct lan743x_adapter * adapter)1606 void lan743x_ptp_close(struct lan743x_adapter *adapter)
1607 {
1608 struct lan743x_ptp *ptp = &adapter->ptp;
1609 int index;
1610
1611 if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) &&
1612 (ptp->flags & PTP_FLAG_PTP_CLOCK_REGISTERED)) {
1613 ptp_clock_unregister(ptp->ptp_clock);
1614 ptp->ptp_clock = NULL;
1615 ptp->flags &= ~PTP_FLAG_PTP_CLOCK_REGISTERED;
1616 netif_info(adapter, drv, adapter->netdev,
1617 "ptp clock unregister\n");
1618 }
1619
1620 if (ptp->flags & PTP_FLAG_ISR_ENABLED) {
1621 lan743x_csr_write(adapter, PTP_INT_EN_CLR,
1622 PTP_INT_BIT_TX_SWTS_ERR_ |
1623 PTP_INT_BIT_TX_TS_);
1624 lan743x_csr_write(adapter, INT_EN_CLR, INT_BIT_1588_);
1625 ptp->flags &= ~PTP_FLAG_ISR_ENABLED;
1626 }
1627
1628 /* clean up pending timestamp requests */
1629 lan743x_ptp_tx_ts_complete(adapter);
1630 spin_lock_bh(&ptp->tx_ts_lock);
1631 for (index = 0;
1632 index < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS;
1633 index++) {
1634 struct sk_buff *skb = ptp->tx_ts_skb_queue[index];
1635
1636 dev_kfree_skb(skb);
1637 ptp->tx_ts_skb_queue[index] = NULL;
1638 ptp->tx_ts_seconds_queue[index] = 0;
1639 ptp->tx_ts_nseconds_queue[index] = 0;
1640 }
1641 ptp->tx_ts_skb_queue_size = 0;
1642 ptp->tx_ts_queue_size = 0;
1643 ptp->pending_tx_timestamps = 0;
1644 spin_unlock_bh(&ptp->tx_ts_lock);
1645
1646 lan743x_led_mux_restore(adapter);
1647
1648 lan743x_ptp_disable(adapter);
1649 }
1650
lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter * adapter,bool ts_insert_enable)1651 static void lan743x_ptp_set_sync_ts_insert(struct lan743x_adapter *adapter,
1652 bool ts_insert_enable)
1653 {
1654 u32 ptp_tx_mod = lan743x_csr_read(adapter, PTP_TX_MOD);
1655
1656 if (ts_insert_enable)
1657 ptp_tx_mod |= PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1658 else
1659 ptp_tx_mod &= ~PTP_TX_MOD_TX_PTP_SYNC_TS_INSERT_;
1660
1661 lan743x_csr_write(adapter, PTP_TX_MOD, ptp_tx_mod);
1662 }
1663
lan743x_ptp_is_enabled(struct lan743x_adapter * adapter)1664 static bool lan743x_ptp_is_enabled(struct lan743x_adapter *adapter)
1665 {
1666 if (lan743x_csr_read(adapter, PTP_CMD_CTL) & PTP_CMD_CTL_PTP_ENABLE_)
1667 return true;
1668 return false;
1669 }
1670
lan743x_ptp_enable(struct lan743x_adapter * adapter)1671 static void lan743x_ptp_enable(struct lan743x_adapter *adapter)
1672 {
1673 struct lan743x_ptp *ptp = &adapter->ptp;
1674
1675 mutex_lock(&ptp->command_lock);
1676
1677 if (lan743x_ptp_is_enabled(adapter)) {
1678 netif_warn(adapter, drv, adapter->netdev,
1679 "PTP already enabled\n");
1680 goto done;
1681 }
1682 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_ENABLE_);
1683 done:
1684 mutex_unlock(&ptp->command_lock);
1685 }
1686
lan743x_ptp_disable(struct lan743x_adapter * adapter)1687 static void lan743x_ptp_disable(struct lan743x_adapter *adapter)
1688 {
1689 struct lan743x_ptp *ptp = &adapter->ptp;
1690
1691 mutex_lock(&ptp->command_lock);
1692 if (!lan743x_ptp_is_enabled(adapter)) {
1693 netif_warn(adapter, drv, adapter->netdev,
1694 "PTP already disabled\n");
1695 goto done;
1696 }
1697 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_DISABLE_);
1698 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_ENABLE_);
1699 done:
1700 mutex_unlock(&ptp->command_lock);
1701 }
1702
lan743x_ptp_reset(struct lan743x_adapter * adapter)1703 static void lan743x_ptp_reset(struct lan743x_adapter *adapter)
1704 {
1705 struct lan743x_ptp *ptp = &adapter->ptp;
1706
1707 mutex_lock(&ptp->command_lock);
1708
1709 if (lan743x_ptp_is_enabled(adapter)) {
1710 netif_err(adapter, drv, adapter->netdev,
1711 "Attempting reset while enabled\n");
1712 goto done;
1713 }
1714
1715 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_RESET_);
1716 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_RESET_);
1717 done:
1718 mutex_unlock(&ptp->command_lock);
1719 }
1720
lan743x_ptp_clock_set(struct lan743x_adapter * adapter,u32 seconds,u32 nano_seconds,u32 sub_nano_seconds)1721 static void lan743x_ptp_clock_set(struct lan743x_adapter *adapter,
1722 u32 seconds, u32 nano_seconds,
1723 u32 sub_nano_seconds)
1724 {
1725 struct lan743x_ptp *ptp = &adapter->ptp;
1726
1727 mutex_lock(&ptp->command_lock);
1728
1729 lan743x_csr_write(adapter, PTP_CLOCK_SEC, seconds);
1730 lan743x_csr_write(adapter, PTP_CLOCK_NS, nano_seconds);
1731 lan743x_csr_write(adapter, PTP_CLOCK_SUBNS, sub_nano_seconds);
1732
1733 lan743x_csr_write(adapter, PTP_CMD_CTL, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1734 lan743x_ptp_wait_till_cmd_done(adapter, PTP_CMD_CTL_PTP_CLOCK_LOAD_);
1735 mutex_unlock(&ptp->command_lock);
1736 }
1737
lan743x_ptp_request_tx_timestamp(struct lan743x_adapter * adapter)1738 bool lan743x_ptp_request_tx_timestamp(struct lan743x_adapter *adapter)
1739 {
1740 struct lan743x_ptp *ptp = &adapter->ptp;
1741 bool result = false;
1742
1743 spin_lock_bh(&ptp->tx_ts_lock);
1744 if (ptp->pending_tx_timestamps < LAN743X_PTP_NUMBER_OF_TX_TIMESTAMPS) {
1745 /* request granted */
1746 ptp->pending_tx_timestamps++;
1747 result = true;
1748 }
1749 spin_unlock_bh(&ptp->tx_ts_lock);
1750 return result;
1751 }
1752
lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter * adapter)1753 void lan743x_ptp_unrequest_tx_timestamp(struct lan743x_adapter *adapter)
1754 {
1755 struct lan743x_ptp *ptp = &adapter->ptp;
1756
1757 spin_lock_bh(&ptp->tx_ts_lock);
1758 if (ptp->pending_tx_timestamps > 0)
1759 ptp->pending_tx_timestamps--;
1760 else
1761 netif_err(adapter, drv, adapter->netdev,
1762 "unrequest failed, pending_tx_timestamps==0\n");
1763 spin_unlock_bh(&ptp->tx_ts_lock);
1764 }
1765
lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter * adapter,struct sk_buff * skb,bool ignore_sync)1766 void lan743x_ptp_tx_timestamp_skb(struct lan743x_adapter *adapter,
1767 struct sk_buff *skb, bool ignore_sync)
1768 {
1769 lan743x_ptp_tx_ts_enqueue_skb(adapter, skb, ignore_sync);
1770
1771 lan743x_ptp_tx_ts_complete(adapter);
1772 }
1773
lan743x_ptp_ioctl(struct net_device * netdev,struct ifreq * ifr,int cmd)1774 int lan743x_ptp_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1775 {
1776 struct lan743x_adapter *adapter = netdev_priv(netdev);
1777 struct hwtstamp_config config;
1778 int ret = 0;
1779 int index;
1780
1781 if (!ifr) {
1782 netif_err(adapter, drv, adapter->netdev,
1783 "SIOCSHWTSTAMP, ifr == NULL\n");
1784 return -EINVAL;
1785 }
1786
1787 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
1788 return -EFAULT;
1789
1790 switch (config.tx_type) {
1791 case HWTSTAMP_TX_OFF:
1792 for (index = 0; index < adapter->used_tx_channels;
1793 index++)
1794 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1795 false, false);
1796 lan743x_ptp_set_sync_ts_insert(adapter, false);
1797 break;
1798 case HWTSTAMP_TX_ON:
1799 for (index = 0; index < adapter->used_tx_channels;
1800 index++)
1801 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1802 true, false);
1803 lan743x_ptp_set_sync_ts_insert(adapter, false);
1804 break;
1805 case HWTSTAMP_TX_ONESTEP_SYNC:
1806 for (index = 0; index < adapter->used_tx_channels;
1807 index++)
1808 lan743x_tx_set_timestamping_mode(&adapter->tx[index],
1809 true, true);
1810
1811 lan743x_ptp_set_sync_ts_insert(adapter, true);
1812 break;
1813 case HWTSTAMP_TX_ONESTEP_P2P:
1814 ret = -ERANGE;
1815 break;
1816 default:
1817 netif_warn(adapter, drv, adapter->netdev,
1818 " tx_type = %d, UNKNOWN\n", config.tx_type);
1819 ret = -EINVAL;
1820 break;
1821 }
1822
1823 if (!ret)
1824 return copy_to_user(ifr->ifr_data, &config,
1825 sizeof(config)) ? -EFAULT : 0;
1826 return ret;
1827 }
1828