diff options
Diffstat (limited to 'drivers/net/ethernet/mscc')
| -rw-r--r-- | drivers/net/ethernet/mscc/ocelot_ptp.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mscc/ocelot_ptp.c b/drivers/net/ethernet/mscc/ocelot_ptp.c index 69d4e5677343..a3088a1676ed 100644 --- a/drivers/net/ethernet/mscc/ocelot_ptp.c +++ b/drivers/net/ethernet/mscc/ocelot_ptp.c @@ -165,11 +165,132 @@ disable_adj: } EXPORT_SYMBOL(ocelot_ptp_adjfine); +int ocelot_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin, + enum ptp_pin_function func, unsigned int chan) +{ + switch (func) { + case PTP_PF_NONE: + case PTP_PF_PEROUT: + break; + case PTP_PF_EXTTS: + case PTP_PF_PHYSYNC: + return -1; + } + return 0; +} +EXPORT_SYMBOL(ocelot_ptp_verify); + +int ocelot_ptp_enable(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + struct ocelot *ocelot = container_of(ptp, struct ocelot, ptp_info); + struct timespec64 ts_start, ts_period; + enum ocelot_ptp_pins ptp_pin; + unsigned long flags; + bool pps = false; + int pin = -1; + u32 val; + s64 ns; + + switch (rq->type) { + case PTP_CLK_REQ_PEROUT: + /* Reject requests with unsupported flags */ + if (rq->perout.flags) + return -EOPNOTSUPP; + + pin = ptp_find_pin(ocelot->ptp_clock, PTP_PF_PEROUT, + rq->perout.index); + if (pin == 0) + ptp_pin = PTP_PIN_0; + else if (pin == 1) + ptp_pin = PTP_PIN_1; + else if (pin == 2) + ptp_pin = PTP_PIN_2; + else if (pin == 3) + ptp_pin = PTP_PIN_3; + else + return -EBUSY; + + ts_start.tv_sec = rq->perout.start.sec; + ts_start.tv_nsec = rq->perout.start.nsec; + ts_period.tv_sec = rq->perout.period.sec; + ts_period.tv_nsec = rq->perout.period.nsec; + + if (ts_period.tv_sec == 1 && ts_period.tv_nsec == 0) + pps = true; + + if (ts_start.tv_sec || (ts_start.tv_nsec && !pps)) { + dev_warn(ocelot->dev, + "Absolute start time not supported!\n"); + dev_warn(ocelot->dev, + "Accept nsec for PPS phase adjustment, otherwise start time should be 0 0.\n"); + return -EINVAL; + } + + /* Handle turning off */ + if (!on) { + spin_lock_irqsave(&ocelot->ptp_clock_lock, flags); + val = PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_IDLE); + ocelot_write_rix(ocelot, val, PTP_PIN_CFG, ptp_pin); + spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags); + break; + } + + /* Handle PPS request */ + if (pps) { + spin_lock_irqsave(&ocelot->ptp_clock_lock, flags); + /* Pulse generated perout.start.nsec after TOD has + * increased seconds. + * Pulse width is set to 1us. + */ + ocelot_write_rix(ocelot, ts_start.tv_nsec, + PTP_PIN_WF_LOW_PERIOD, ptp_pin); + ocelot_write_rix(ocelot, 1000, + PTP_PIN_WF_HIGH_PERIOD, ptp_pin); + val = PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_CLOCK); + val |= PTP_PIN_CFG_SYNC; + ocelot_write_rix(ocelot, val, PTP_PIN_CFG, ptp_pin); + spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags); + break; + } + + /* Handle periodic clock */ + ns = timespec64_to_ns(&ts_period); + ns = ns >> 1; + if (ns > 0x3fffffff || ns <= 0x6) + return -EINVAL; + + spin_lock_irqsave(&ocelot->ptp_clock_lock, flags); + ocelot_write_rix(ocelot, ns, PTP_PIN_WF_LOW_PERIOD, ptp_pin); + ocelot_write_rix(ocelot, ns, PTP_PIN_WF_HIGH_PERIOD, ptp_pin); + val = PTP_PIN_CFG_ACTION(PTP_PIN_ACTION_CLOCK); + ocelot_write_rix(ocelot, val, PTP_PIN_CFG, ptp_pin); + spin_unlock_irqrestore(&ocelot->ptp_clock_lock, flags); + break; + default: + return -EOPNOTSUPP; + } + return 0; +} +EXPORT_SYMBOL(ocelot_ptp_enable); + int ocelot_init_timestamp(struct ocelot *ocelot, struct ptp_clock_info *info) { struct ptp_clock *ptp_clock; + int i; ocelot->ptp_info = *info; + + for (i = 0; i < OCELOT_PTP_PINS_NUM; i++) { + struct ptp_pin_desc *p = &ocelot->ptp_pins[i]; + + snprintf(p->name, sizeof(p->name), "switch_1588_dat%d", i); + p->index = i; + p->func = PTP_PF_NONE; + } + + ocelot->ptp_info.pin_config = &ocelot->ptp_pins[0]; + ptp_clock = ptp_clock_register(&ocelot->ptp_info, ocelot->dev); if (IS_ERR(ptp_clock)) return PTR_ERR(ptp_clock); |