Lines Matching +full:pps +full:- +full:channel
1 // SPDX-License-Identifier: GPL-2.0
92 * fec_ptp_read - read raw cycle counter (to be used by time counter)
105 tempval = readl(fep->hwp + FEC_ATIME_CTRL); in fec_ptp_read()
107 writel(tempval, fep->hwp + FEC_ATIME_CTRL); in fec_ptp_read()
109 if (fep->quirks & FEC_QUIRK_BUG_CAPTURE) in fec_ptp_read()
112 return readl(fep->hwp + FEC_ATIME); in fec_ptp_read()
118 * @enable: enable the channel pps output
120 * This function enble the PPS ouput on the timer channel.
129 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_enable_pps()
131 if (fep->pps_enable == enable) { in fec_ptp_enable_pps()
132 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_enable_pps()
139 writel(FEC_T_TF_MASK, fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_enable_pps()
145 val = readl(fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_enable_pps()
148 writel(val, fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_enable_pps()
149 val = readl(fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_enable_pps()
153 timecounter_read(&fep->tc); in fec_ptp_enable_pps()
158 * NSEC_PER_SEC - ts.tv_nsec. Add the remaining nanoseconds in fec_ptp_enable_pps()
161 tempval = fec_ptp_read(&fep->cc); in fec_ptp_enable_pps()
163 ns = timecounter_cyc2time(&fep->tc, tempval); in fec_ptp_enable_pps()
169 val = NSEC_PER_SEC - (u32)ts.tv_nsec + tempval; in fec_ptp_enable_pps()
173 * - ts.tv_nsec is close to be zero(For example 20ns); Since the timer in fec_ptp_enable_pps()
178 * of next second. The current setting is 31-bit timer and wrap in fec_ptp_enable_pps()
184 /* We add (2 * NSEC_PER_SEC - (u32)ts.tv_nsec) to current in fec_ptp_enable_pps()
185 * ptp counter, which maybe cause 32-bit wrap. Since the in fec_ptp_enable_pps()
186 * (NSEC_PER_SEC - (u32)ts.tv_nsec) is less than 2 second. in fec_ptp_enable_pps()
188 * is bigger than fep->cc.mask would be a error. in fec_ptp_enable_pps()
190 val &= fep->cc.mask; in fec_ptp_enable_pps()
191 writel(val, fep->hwp + FEC_TCCR(fep->pps_channel)); in fec_ptp_enable_pps()
194 fep->next_counter = (val + fep->reload_period) & fep->cc.mask; in fec_ptp_enable_pps()
197 val = readl(fep->hwp + FEC_ATIME_CTRL); in fec_ptp_enable_pps()
199 writel(val, fep->hwp + FEC_ATIME_CTRL); in fec_ptp_enable_pps()
201 /* Compare channel setting. */ in fec_ptp_enable_pps()
202 val = readl(fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_enable_pps()
207 writel(val, fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_enable_pps()
212 writel(fep->next_counter, fep->hwp + FEC_TCCR(fep->pps_channel)); in fec_ptp_enable_pps()
213 fep->next_counter = (fep->next_counter + fep->reload_period) & fep->cc.mask; in fec_ptp_enable_pps()
215 writel(0, fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_enable_pps()
218 fep->pps_enable = enable; in fec_ptp_enable_pps()
219 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_enable_pps()
230 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_pps_perout()
233 timecounter_read(&fep->tc); in fec_ptp_pps_perout()
236 ptp_hc = fec_ptp_read(&fep->cc); in fec_ptp_pps_perout()
239 curr_time = timecounter_cyc2time(&fep->tc, ptp_hc); in fec_ptp_pps_perout()
241 /* If the pps start time less than current time add 100ms, just return. in fec_ptp_pps_perout()
245 if (fep->perout_stime < curr_time + 100 * NSEC_PER_MSEC) { in fec_ptp_pps_perout()
246 dev_err(&fep->pdev->dev, "Current time is too close to the start time!\n"); in fec_ptp_pps_perout()
247 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_pps_perout()
248 return -1; in fec_ptp_pps_perout()
251 compare_val = fep->perout_stime - curr_time + ptp_hc; in fec_ptp_pps_perout()
252 compare_val &= fep->cc.mask; in fec_ptp_pps_perout()
254 writel(compare_val, fep->hwp + FEC_TCCR(fep->pps_channel)); in fec_ptp_pps_perout()
255 fep->next_counter = (compare_val + fep->reload_period) & fep->cc.mask; in fec_ptp_pps_perout()
258 temp_val = readl(fep->hwp + FEC_ATIME_CTRL); in fec_ptp_pps_perout()
260 writel(temp_val, fep->hwp + FEC_ATIME_CTRL); in fec_ptp_pps_perout()
262 /* Compare channel setting. */ in fec_ptp_pps_perout()
263 temp_val = readl(fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_pps_perout()
268 writel(temp_val, fep->hwp + FEC_TCSR(fep->pps_channel)); in fec_ptp_pps_perout()
273 writel(fep->next_counter, fep->hwp + FEC_TCCR(fep->pps_channel)); in fec_ptp_pps_perout()
274 fep->next_counter = (fep->next_counter + fep->reload_period) & fep->cc.mask; in fec_ptp_pps_perout()
275 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_pps_perout()
291 * fec_ptp_start_cyclecounter - create the cycle counter from hw
304 inc = 1000000000 / fep->cycle_speed; in fec_ptp_start_cyclecounter()
307 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_start_cyclecounter()
310 writel(inc << FEC_T_INC_OFFSET, fep->hwp + FEC_ATIME_INC); in fec_ptp_start_cyclecounter()
312 /* use 31-bit timer counter */ in fec_ptp_start_cyclecounter()
313 writel(FEC_COUNTER_PERIOD, fep->hwp + FEC_ATIME_EVT_PERIOD); in fec_ptp_start_cyclecounter()
316 fep->hwp + FEC_ATIME_CTRL); in fec_ptp_start_cyclecounter()
318 memset(&fep->cc, 0, sizeof(fep->cc)); in fec_ptp_start_cyclecounter()
319 fep->cc.read = fec_ptp_read; in fec_ptp_start_cyclecounter()
320 fep->cc.mask = CLOCKSOURCE_MASK(31); in fec_ptp_start_cyclecounter()
321 fep->cc.shift = 31; in fec_ptp_start_cyclecounter()
322 fep->cc.mult = FEC_CC_MULT; in fec_ptp_start_cyclecounter()
325 timecounter_init(&fep->tc, &fep->cc, 0); in fec_ptp_start_cyclecounter()
327 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_start_cyclecounter()
331 * fec_ptp_adjfine - adjust ptp cycle frequency
338 * Scaled parts per million is ppm with a 16-bit binary fractional field.
360 ppb = -ppb; in fec_ptp_adjfine()
365 * Try to find the corr_inc between 1 to fep->ptp_inc to in fec_ptp_adjfine()
369 rhs = (u64)ppb * (u64)fep->ptp_inc; in fec_ptp_adjfine()
370 for (i = 1; i <= fep->ptp_inc; i++) { in fec_ptp_adjfine()
378 /* Not found? Set it to high value - double speed in fec_ptp_adjfine()
381 if (i > fep->ptp_inc) { in fec_ptp_adjfine()
382 corr_inc = fep->ptp_inc; in fec_ptp_adjfine()
387 corr_ns = fep->ptp_inc - corr_inc; in fec_ptp_adjfine()
389 corr_ns = fep->ptp_inc + corr_inc; in fec_ptp_adjfine()
391 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_adjfine()
393 tmp = readl(fep->hwp + FEC_ATIME_INC) & FEC_T_INC_MASK; in fec_ptp_adjfine()
395 writel(tmp, fep->hwp + FEC_ATIME_INC); in fec_ptp_adjfine()
396 corr_period = corr_period > 1 ? corr_period - 1 : corr_period; in fec_ptp_adjfine()
397 writel(corr_period, fep->hwp + FEC_ATIME_CORR); in fec_ptp_adjfine()
399 timecounter_read(&fep->tc); in fec_ptp_adjfine()
401 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_adjfine()
419 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_adjtime()
420 timecounter_adjtime(&fep->tc, delta); in fec_ptp_adjtime()
421 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_adjtime()
441 mutex_lock(&fep->ptp_clk_mutex); in fec_ptp_gettime()
443 if (!fep->ptp_clk_on) { in fec_ptp_gettime()
444 mutex_unlock(&fep->ptp_clk_mutex); in fec_ptp_gettime()
445 return -EINVAL; in fec_ptp_gettime()
447 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_gettime()
448 ns = timecounter_read(&fep->tc); in fec_ptp_gettime()
449 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_gettime()
450 mutex_unlock(&fep->ptp_clk_mutex); in fec_ptp_gettime()
475 mutex_lock(&fep->ptp_clk_mutex); in fec_ptp_settime()
477 if (!fep->ptp_clk_on) { in fec_ptp_settime()
478 mutex_unlock(&fep->ptp_clk_mutex); in fec_ptp_settime()
479 return -EINVAL; in fec_ptp_settime()
486 counter = ns & fep->cc.mask; in fec_ptp_settime()
488 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_settime()
489 writel(counter, fep->hwp + FEC_ATIME); in fec_ptp_settime()
490 timecounter_init(&fep->tc, &fep->cc, ns); in fec_ptp_settime()
491 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_settime()
492 mutex_unlock(&fep->ptp_clk_mutex); in fec_ptp_settime()
496 static int fec_ptp_pps_disable(struct fec_enet_private *fep, uint channel) in fec_ptp_pps_disable() argument
500 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_pps_disable()
501 writel(0, fep->hwp + FEC_TCSR(channel)); in fec_ptp_pps_disable()
502 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_pps_disable()
525 if (rq->type == PTP_CLK_REQ_PPS) { in fec_ptp_enable()
526 fep->reload_period = PPS_OUPUT_RELOAD_PERIOD; in fec_ptp_enable()
531 } else if (rq->type == PTP_CLK_REQ_PEROUT) { in fec_ptp_enable()
533 if (rq->perout.flags) in fec_ptp_enable()
534 return -EOPNOTSUPP; in fec_ptp_enable()
536 if (rq->perout.index != fep->pps_channel) in fec_ptp_enable()
537 return -EOPNOTSUPP; in fec_ptp_enable()
539 period.tv_sec = rq->perout.period.sec; in fec_ptp_enable()
540 period.tv_nsec = rq->perout.period.nsec; in fec_ptp_enable()
547 dev_err(&fep->pdev->dev, "The period must equal to or less than 4s!\n"); in fec_ptp_enable()
548 return -EOPNOTSUPP; in fec_ptp_enable()
551 fep->reload_period = div_u64(period_ns, 2); in fec_ptp_enable()
552 if (on && fep->reload_period) { in fec_ptp_enable()
554 start_time.tv_sec = rq->perout.start.sec; in fec_ptp_enable()
555 start_time.tv_nsec = rq->perout.start.nsec; in fec_ptp_enable()
556 fep->perout_stime = timespec64_to_ns(&start_time); in fec_ptp_enable()
558 mutex_lock(&fep->ptp_clk_mutex); in fec_ptp_enable()
559 if (!fep->ptp_clk_on) { in fec_ptp_enable()
560 dev_err(&fep->pdev->dev, "Error: PTP clock is closed!\n"); in fec_ptp_enable()
561 mutex_unlock(&fep->ptp_clk_mutex); in fec_ptp_enable()
562 return -EOPNOTSUPP; in fec_ptp_enable()
564 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_enable()
566 curr_time = timecounter_read(&fep->tc); in fec_ptp_enable()
567 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_enable()
568 mutex_unlock(&fep->ptp_clk_mutex); in fec_ptp_enable()
571 delta = fep->perout_stime - curr_time; in fec_ptp_enable()
573 if (fep->perout_stime <= curr_time) { in fec_ptp_enable()
574 dev_err(&fep->pdev->dev, "Start time must larger than current time!\n"); in fec_ptp_enable()
575 return -EINVAL; in fec_ptp_enable()
578 /* Because the timer counter of FEC only has 31-bits, correspondingly, in fec_ptp_enable()
580 * set. If the start time of pps signal exceeds current time more than in fec_ptp_enable()
585 timeout = ns_to_ktime(delta - NSEC_PER_SEC); in fec_ptp_enable()
586 hrtimer_start(&fep->perout_timer, timeout, HRTIMER_MODE_REL); in fec_ptp_enable()
591 fec_ptp_pps_disable(fep, fep->pps_channel); in fec_ptp_enable()
596 return -EOPNOTSUPP; in fec_ptp_enable()
605 switch (config->tx_type) { in fec_ptp_set()
607 fep->hwts_tx_en = 0; in fec_ptp_set()
610 fep->hwts_tx_en = 1; in fec_ptp_set()
613 return -ERANGE; in fec_ptp_set()
616 switch (config->rx_filter) { in fec_ptp_set()
618 fep->hwts_rx_en = 0; in fec_ptp_set()
622 fep->hwts_rx_en = 1; in fec_ptp_set()
623 config->rx_filter = HWTSTAMP_FILTER_ALL; in fec_ptp_set()
634 config->flags = 0; in fec_ptp_get()
635 config->tx_type = fep->hwts_tx_en ? HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF; in fec_ptp_get()
636 config->rx_filter = (fep->hwts_rx_en ? in fec_ptp_get()
641 * fec_time_keep - call timecounter_read every second to avoid timer overrun
650 mutex_lock(&fep->ptp_clk_mutex); in fec_time_keep()
651 if (fep->ptp_clk_on) { in fec_time_keep()
652 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_time_keep()
653 timecounter_read(&fep->tc); in fec_time_keep()
654 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_time_keep()
656 mutex_unlock(&fep->ptp_clk_mutex); in fec_time_keep()
658 schedule_delayed_work(&fep->time_keep, HZ); in fec_time_keep()
661 /* This function checks the pps event and reloads the timer compare counter. */
667 u8 channel = fep->pps_channel; in fec_pps_interrupt() local
670 val = readl(fep->hwp + FEC_TCSR(channel)); in fec_pps_interrupt()
675 writel(fep->next_counter, fep->hwp + FEC_TCCR(channel)); in fec_pps_interrupt()
677 writel(val, fep->hwp + FEC_TCSR(channel)); in fec_pps_interrupt()
678 } while (readl(fep->hwp + FEC_TCSR(channel)) & FEC_T_TF_MASK); in fec_pps_interrupt()
681 fep->next_counter = (fep->next_counter + fep->reload_period) & in fec_pps_interrupt()
682 fep->cc.mask; in fec_pps_interrupt()
685 ptp_clock_event(fep->ptp_clock, &event); in fec_pps_interrupt()
706 struct device_node *np = fep->pdev->dev.of_node; in fec_ptp_init()
710 fep->ptp_caps.owner = THIS_MODULE; in fec_ptp_init()
711 strscpy(fep->ptp_caps.name, "fec ptp", sizeof(fep->ptp_caps.name)); in fec_ptp_init()
713 fep->pps_channel = DEFAULT_PPS_CHANNEL; in fec_ptp_init()
714 of_property_read_u32(np, "fsl,pps-channel", &fep->pps_channel); in fec_ptp_init()
716 fep->ptp_caps.max_adj = 250000000; in fec_ptp_init()
717 fep->ptp_caps.n_alarm = 0; in fec_ptp_init()
718 fep->ptp_caps.n_ext_ts = 0; in fec_ptp_init()
719 fep->ptp_caps.n_per_out = 1; in fec_ptp_init()
720 fep->ptp_caps.n_pins = 0; in fec_ptp_init()
721 fep->ptp_caps.pps = 1; in fec_ptp_init()
722 fep->ptp_caps.adjfine = fec_ptp_adjfine; in fec_ptp_init()
723 fep->ptp_caps.adjtime = fec_ptp_adjtime; in fec_ptp_init()
724 fep->ptp_caps.gettime64 = fec_ptp_gettime; in fec_ptp_init()
725 fep->ptp_caps.settime64 = fec_ptp_settime; in fec_ptp_init()
726 fep->ptp_caps.enable = fec_ptp_enable; in fec_ptp_init()
728 fep->cycle_speed = clk_get_rate(fep->clk_ptp); in fec_ptp_init()
729 if (!fep->cycle_speed) { in fec_ptp_init()
730 fep->cycle_speed = NSEC_PER_SEC; in fec_ptp_init()
731 dev_err(&fep->pdev->dev, "clk_ptp clock rate is zero\n"); in fec_ptp_init()
733 fep->ptp_inc = NSEC_PER_SEC / fep->cycle_speed; in fec_ptp_init()
735 spin_lock_init(&fep->tmreg_lock); in fec_ptp_init()
739 INIT_DELAYED_WORK(&fep->time_keep, fec_time_keep); in fec_ptp_init()
741 hrtimer_setup(&fep->perout_timer, fec_ptp_pps_perout_handler, CLOCK_REALTIME, in fec_ptp_init()
744 irq = platform_get_irq_byname_optional(pdev, "pps"); in fec_ptp_init()
751 ret = devm_request_irq(&pdev->dev, irq, fec_pps_interrupt, in fec_ptp_init()
752 0, pdev->name, ndev); in fec_ptp_init()
754 dev_warn(&pdev->dev, "request for pps irq failed(%d)\n", in fec_ptp_init()
758 fep->ptp_clock = ptp_clock_register(&fep->ptp_caps, &pdev->dev); in fec_ptp_init()
759 if (IS_ERR(fep->ptp_clock)) { in fec_ptp_init()
760 fep->ptp_clock = NULL; in fec_ptp_init()
761 dev_err(&pdev->dev, "ptp_clock_register failed\n"); in fec_ptp_init()
764 schedule_delayed_work(&fep->time_keep, HZ); in fec_ptp_init()
772 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_save_state()
774 fep->ptp_saved_state.pps_enable = fep->pps_enable; in fec_ptp_save_state()
776 fep->ptp_saved_state.ns_phc = timecounter_read(&fep->tc); in fec_ptp_save_state()
777 fep->ptp_saved_state.ns_sys = ktime_get_ns(); in fec_ptp_save_state()
779 fep->ptp_saved_state.at_corr = readl(fep->hwp + FEC_ATIME_CORR); in fec_ptp_save_state()
780 atime_inc_corr = readl(fep->hwp + FEC_ATIME_INC) & FEC_T_INC_CORR_MASK; in fec_ptp_save_state()
781 fep->ptp_saved_state.at_inc_corr = (u8)(atime_inc_corr >> FEC_T_INC_CORR_OFFSET); in fec_ptp_save_state()
783 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_save_state()
789 u32 atime_inc = readl(fep->hwp + FEC_ATIME_INC) & FEC_T_INC_MASK; in fec_ptp_restore_state()
794 spin_lock_irqsave(&fep->tmreg_lock, flags); in fec_ptp_restore_state()
797 fep->pps_enable = 0; in fec_ptp_restore_state()
799 writel(fep->ptp_saved_state.at_corr, fep->hwp + FEC_ATIME_CORR); in fec_ptp_restore_state()
800 atime_inc |= ((u32)fep->ptp_saved_state.at_inc_corr) << FEC_T_INC_CORR_OFFSET; in fec_ptp_restore_state()
801 writel(atime_inc, fep->hwp + FEC_ATIME_INC); in fec_ptp_restore_state()
803 ns = ktime_get_ns() - fep->ptp_saved_state.ns_sys + fep->ptp_saved_state.ns_phc; in fec_ptp_restore_state()
804 counter = ns & fep->cc.mask; in fec_ptp_restore_state()
805 writel(counter, fep->hwp + FEC_ATIME); in fec_ptp_restore_state()
806 timecounter_init(&fep->tc, &fep->cc, ns); in fec_ptp_restore_state()
808 spin_unlock_irqrestore(&fep->tmreg_lock, flags); in fec_ptp_restore_state()
810 /* Restart PPS if needed */ in fec_ptp_restore_state()
811 if (fep->ptp_saved_state.pps_enable) { in fec_ptp_restore_state()
812 /* Re-enable PPS */ in fec_ptp_restore_state()
822 if (fep->pps_enable) in fec_ptp_stop()
825 cancel_delayed_work_sync(&fep->time_keep); in fec_ptp_stop()
826 hrtimer_cancel(&fep->perout_timer); in fec_ptp_stop()
827 if (fep->ptp_clock) in fec_ptp_stop()
828 ptp_clock_unregister(fep->ptp_clock); in fec_ptp_stop()