diff options
Diffstat (limited to 'drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c | 897 |
1 files changed, 897 insertions, 0 deletions
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c new file mode 100644 index 000000000000..e5a2bbe064f8 --- /dev/null +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c @@ -0,0 +1,897 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#include <linux/ptp_classify.h> + +#include "lan966x_main.h" + +#define LAN966X_MAX_PTP_ID 512 + +/* Represents 1ppm adjustment in 2^59 format with 6.037735849ns as reference + * The value is calculated as following: (1/1000000)/((2^-59)/6.037735849) + */ +#define LAN966X_1PPM_FORMAT 3480517749723LL + +/* Represents 1ppb adjustment in 2^29 format with 6.037735849ns as reference + * The value is calculated as following: (1/1000000000)/((2^59)/6.037735849) + */ +#define LAN966X_1PPB_FORMAT 3480517749LL + +#define TOD_ACC_PIN 0x7 + +enum { + PTP_PIN_ACTION_IDLE = 0, + PTP_PIN_ACTION_LOAD, + PTP_PIN_ACTION_SAVE, + PTP_PIN_ACTION_CLOCK, + PTP_PIN_ACTION_DELTA, + PTP_PIN_ACTION_TOD +}; + +static u64 lan966x_ptp_get_nominal_value(void) +{ + /* This is the default value that for each system clock, the time of day + * is increased. It has the format 5.59 nanosecond. + */ + return 0x304d4873ecade305; +} + +int lan966x_ptp_hwtstamp_set(struct lan966x_port *port, struct ifreq *ifr) +{ + struct lan966x *lan966x = port->lan966x; + struct hwtstamp_config cfg; + struct lan966x_phc *phc; + + /* For now don't allow to run ptp on ports that are part of a bridge, + * because in case of transparent clock the HW will still forward the + * frames, so there would be duplicate frames + */ + if (lan966x->bridge_mask & BIT(port->chip_port)) + return -EINVAL; + + if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) + return -EFAULT; + + switch (cfg.tx_type) { + case HWTSTAMP_TX_ON: + port->ptp_cmd = IFH_REW_OP_TWO_STEP_PTP; + break; + case HWTSTAMP_TX_ONESTEP_SYNC: + port->ptp_cmd = IFH_REW_OP_ONE_STEP_PTP; + break; + case HWTSTAMP_TX_OFF: + port->ptp_cmd = IFH_REW_OP_NOOP; + break; + default: + return -ERANGE; + } + + switch (cfg.rx_filter) { + case HWTSTAMP_FILTER_NONE: + break; + case HWTSTAMP_FILTER_ALL: + case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: + case HWTSTAMP_FILTER_PTP_V2_EVENT: + case HWTSTAMP_FILTER_PTP_V2_SYNC: + case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: + case HWTSTAMP_FILTER_NTP_ALL: + cfg.rx_filter = HWTSTAMP_FILTER_ALL; + break; + default: + return -ERANGE; + } + + /* Commit back the result & save it */ + mutex_lock(&lan966x->ptp_lock); + phc = &lan966x->phc[LAN966X_PHC_PORT]; + memcpy(&phc->hwtstamp_config, &cfg, sizeof(cfg)); + mutex_unlock(&lan966x->ptp_lock); + + return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0; +} + +int lan966x_ptp_hwtstamp_get(struct lan966x_port *port, struct ifreq *ifr) +{ + struct lan966x *lan966x = port->lan966x; + struct lan966x_phc *phc; + + phc = &lan966x->phc[LAN966X_PHC_PORT]; + return copy_to_user(ifr->ifr_data, &phc->hwtstamp_config, + sizeof(phc->hwtstamp_config)) ? -EFAULT : 0; +} + +static int lan966x_ptp_classify(struct lan966x_port *port, struct sk_buff *skb) +{ + struct ptp_header *header; + u8 msgtype; + int type; + + if (port->ptp_cmd == IFH_REW_OP_NOOP) + return IFH_REW_OP_NOOP; + + type = ptp_classify_raw(skb); + if (type == PTP_CLASS_NONE) + return IFH_REW_OP_NOOP; + + header = ptp_parse_header(skb, type); + if (!header) + return IFH_REW_OP_NOOP; + + if (port->ptp_cmd == IFH_REW_OP_TWO_STEP_PTP) + return IFH_REW_OP_TWO_STEP_PTP; + + /* If it is sync and run 1 step then set the correct operation, + * otherwise run as 2 step + */ + msgtype = ptp_get_msgtype(header, type); + if ((msgtype & 0xf) == 0) + return IFH_REW_OP_ONE_STEP_PTP; + + return IFH_REW_OP_TWO_STEP_PTP; +} + +static void lan966x_ptp_txtstamp_old_release(struct lan966x_port *port) +{ + struct sk_buff *skb, *skb_tmp; + unsigned long flags; + + spin_lock_irqsave(&port->tx_skbs.lock, flags); + skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) { + if time_after(LAN966X_SKB_CB(skb)->jiffies + LAN966X_PTP_TIMEOUT, + jiffies) + break; + + __skb_unlink(skb, &port->tx_skbs); + dev_kfree_skb_any(skb); + } + spin_unlock_irqrestore(&port->tx_skbs.lock, flags); +} + +int lan966x_ptp_txtstamp_request(struct lan966x_port *port, + struct sk_buff *skb) +{ + struct lan966x *lan966x = port->lan966x; + unsigned long flags; + u8 rew_op; + + rew_op = lan966x_ptp_classify(port, skb); + LAN966X_SKB_CB(skb)->rew_op = rew_op; + + if (rew_op != IFH_REW_OP_TWO_STEP_PTP) + return 0; + + lan966x_ptp_txtstamp_old_release(port); + + spin_lock_irqsave(&lan966x->ptp_ts_id_lock, flags); + if (lan966x->ptp_skbs == LAN966X_MAX_PTP_ID) { + spin_unlock_irqrestore(&lan966x->ptp_ts_id_lock, flags); + return -EBUSY; + } + + skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; + + skb_queue_tail(&port->tx_skbs, skb); + LAN966X_SKB_CB(skb)->ts_id = port->ts_id; + LAN966X_SKB_CB(skb)->jiffies = jiffies; + + lan966x->ptp_skbs++; + port->ts_id++; + if (port->ts_id == LAN966X_MAX_PTP_ID) + port->ts_id = 0; + + spin_unlock_irqrestore(&lan966x->ptp_ts_id_lock, flags); + + return 0; +} + +void lan966x_ptp_txtstamp_release(struct lan966x_port *port, + struct sk_buff *skb) +{ + struct lan966x *lan966x = port->lan966x; + unsigned long flags; + + spin_lock_irqsave(&lan966x->ptp_ts_id_lock, flags); + port->ts_id--; + lan966x->ptp_skbs--; + skb_unlink(skb, &port->tx_skbs); + spin_unlock_irqrestore(&lan966x->ptp_ts_id_lock, flags); +} + +static void lan966x_get_hwtimestamp(struct lan966x *lan966x, + struct timespec64 *ts, + u32 nsec) +{ + /* Read current PTP time to get seconds */ + unsigned long flags; + u32 curr_nsec; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) | + PTP_PIN_CFG_PIN_DOM_SET(LAN966X_PHC_PORT) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(TOD_ACC_PIN)); + + ts->tv_sec = lan_rd(lan966x, PTP_TOD_SEC_LSB(TOD_ACC_PIN)); + curr_nsec = lan_rd(lan966x, PTP_TOD_NSEC(TOD_ACC_PIN)); + + ts->tv_nsec = nsec; + + /* Sec has incremented since the ts was registered */ + if (curr_nsec < nsec) + ts->tv_sec--; + + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); +} + +irqreturn_t lan966x_ptp_irq_handler(int irq, void *args) +{ + int budget = LAN966X_MAX_PTP_ID; + struct lan966x *lan966x = args; + + while (budget--) { + struct sk_buff *skb, *skb_tmp, *skb_match = NULL; + struct skb_shared_hwtstamps shhwtstamps; + struct lan966x_port *port; + struct timespec64 ts; + unsigned long flags; + u32 val, id, txport; + u32 delay; + + val = lan_rd(lan966x, PTP_TWOSTEP_CTRL); + + /* Check if a timestamp can be retrieved */ + if (!(val & PTP_TWOSTEP_CTRL_VLD)) + break; + + WARN_ON(val & PTP_TWOSTEP_CTRL_OVFL); + + if (!(val & PTP_TWOSTEP_CTRL_STAMP_TX)) + continue; + + /* Retrieve the ts Tx port */ + txport = PTP_TWOSTEP_CTRL_STAMP_PORT_GET(val); + + /* Retrieve its associated skb */ + port = lan966x->ports[txport]; + + /* Retrieve the delay */ + delay = lan_rd(lan966x, PTP_TWOSTEP_STAMP); + delay = PTP_TWOSTEP_STAMP_STAMP_NSEC_GET(delay); + + /* Get next timestamp from fifo, which needs to be the + * rx timestamp which represents the id of the frame + */ + lan_rmw(PTP_TWOSTEP_CTRL_NXT_SET(1), + PTP_TWOSTEP_CTRL_NXT, + lan966x, PTP_TWOSTEP_CTRL); + + val = lan_rd(lan966x, PTP_TWOSTEP_CTRL); + + /* Check if a timestamp can be retried */ + if (!(val & PTP_TWOSTEP_CTRL_VLD)) + break; + + /* Read RX timestamping to get the ID */ + id = lan_rd(lan966x, PTP_TWOSTEP_STAMP); + + spin_lock_irqsave(&port->tx_skbs.lock, flags); + skb_queue_walk_safe(&port->tx_skbs, skb, skb_tmp) { + if (LAN966X_SKB_CB(skb)->ts_id != id) + continue; + + __skb_unlink(skb, &port->tx_skbs); + skb_match = skb; + break; + } + spin_unlock_irqrestore(&port->tx_skbs.lock, flags); + + /* Next ts */ + lan_rmw(PTP_TWOSTEP_CTRL_NXT_SET(1), + PTP_TWOSTEP_CTRL_NXT, + lan966x, PTP_TWOSTEP_CTRL); + + if (WARN_ON(!skb_match)) + continue; + + spin_lock(&lan966x->ptp_ts_id_lock); + lan966x->ptp_skbs--; + spin_unlock(&lan966x->ptp_ts_id_lock); + + /* Get the h/w timestamp */ + lan966x_get_hwtimestamp(lan966x, &ts, delay); + + /* Set the timestamp into the skb */ + shhwtstamps.hwtstamp = ktime_set(ts.tv_sec, ts.tv_nsec); + skb_tstamp_tx(skb_match, &shhwtstamps); + + dev_kfree_skb_any(skb_match); + } + + return IRQ_HANDLED; +} + +irqreturn_t lan966x_ptp_ext_irq_handler(int irq, void *args) +{ + struct lan966x *lan966x = args; + struct lan966x_phc *phc; + unsigned long flags; + u64 time = 0; + time64_t s; + int pin, i; + s64 ns; + + if (!(lan_rd(lan966x, PTP_PIN_INTR))) + return IRQ_NONE; + + /* Go through all domains and see which pin generated the interrupt */ + for (i = 0; i < LAN966X_PHC_COUNT; ++i) { + struct ptp_clock_event ptp_event = {0}; + + phc = &lan966x->phc[i]; + pin = ptp_find_pin_unlocked(phc->clock, PTP_PF_EXTTS, 0); + if (pin == -1) + continue; + + if (!(lan_rd(lan966x, PTP_PIN_INTR) & BIT(pin))) + continue; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + + /* Enable to get the new interrupt. + * By writing 1 it clears the bit + */ + lan_wr(BIT(pin), lan966x, PTP_PIN_INTR); + + /* Get current time */ + s = lan_rd(lan966x, PTP_TOD_SEC_MSB(pin)); + s <<= 32; + s |= lan_rd(lan966x, PTP_TOD_SEC_LSB(pin)); + ns = lan_rd(lan966x, PTP_TOD_NSEC(pin)); + ns &= PTP_TOD_NSEC_TOD_NSEC; + + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + + if ((ns & 0xFFFFFFF0) == 0x3FFFFFF0) { + s--; + ns &= 0xf; + ns += 999999984; + } + time = ktime_set(s, ns); + + ptp_event.index = pin; + ptp_event.timestamp = time; + ptp_event.type = PTP_CLOCK_EXTTS; + ptp_clock_event(phc->clock, &ptp_event); + } + + return IRQ_HANDLED; +} + +static int lan966x_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm) +{ + struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info); + struct lan966x *lan966x = phc->lan966x; + unsigned long flags; + bool neg_adj = 0; + u64 tod_inc; + u64 ref; + + if (!scaled_ppm) + return 0; + + if (scaled_ppm < 0) { + neg_adj = 1; + scaled_ppm = -scaled_ppm; + } + + tod_inc = lan966x_ptp_get_nominal_value(); + + /* The multiplication is split in 2 separate additions because of + * overflow issues. If scaled_ppm with 16bit fractional part was bigger + * than 20ppm then we got overflow. + */ + ref = LAN966X_1PPM_FORMAT * (scaled_ppm >> 16); + ref += (LAN966X_1PPM_FORMAT * (0xffff & scaled_ppm)) >> 16; + tod_inc = neg_adj ? tod_inc - ref : tod_inc + ref; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + + lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(1 << BIT(phc->index)), + PTP_DOM_CFG_CLKCFG_DIS, + lan966x, PTP_DOM_CFG); + + lan_wr((u32)tod_inc & 0xFFFFFFFF, lan966x, + PTP_CLK_PER_CFG(phc->index, 0)); + lan_wr((u32)(tod_inc >> 32), lan966x, + PTP_CLK_PER_CFG(phc->index, 1)); + + lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(0), + PTP_DOM_CFG_CLKCFG_DIS, + lan966x, PTP_DOM_CFG); + + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + + return 0; +} + +static int lan966x_ptp_settime64(struct ptp_clock_info *ptp, + const struct timespec64 *ts) +{ + struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info); + struct lan966x *lan966x = phc->lan966x; + unsigned long flags; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + + /* Must be in IDLE mode before the time can be loaded */ + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(TOD_ACC_PIN)); + + /* Set new value */ + lan_wr(PTP_TOD_SEC_MSB_TOD_SEC_MSB_SET(upper_32_bits(ts->tv_sec)), + lan966x, PTP_TOD_SEC_MSB(TOD_ACC_PIN)); + lan_wr(lower_32_bits(ts->tv_sec), + lan966x, PTP_TOD_SEC_LSB(TOD_ACC_PIN)); + lan_wr(ts->tv_nsec, lan966x, PTP_TOD_NSEC(TOD_ACC_PIN)); + + /* Apply new values */ + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_LOAD) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(TOD_ACC_PIN)); + + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + + return 0; +} + +int lan966x_ptp_gettime64(struct ptp_clock_info *ptp, struct timespec64 *ts) +{ + struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info); + struct lan966x *lan966x = phc->lan966x; + unsigned long flags; + time64_t s; + s64 ns; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(TOD_ACC_PIN)); + + s = lan_rd(lan966x, PTP_TOD_SEC_MSB(TOD_ACC_PIN)); + s <<= 32; + s |= lan_rd(lan966x, PTP_TOD_SEC_LSB(TOD_ACC_PIN)); + ns = lan_rd(lan966x, PTP_TOD_NSEC(TOD_ACC_PIN)); + ns &= PTP_TOD_NSEC_TOD_NSEC; + + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + + /* Deal with negative values */ + if ((ns & 0xFFFFFFF0) == 0x3FFFFFF0) { + s--; + ns &= 0xf; + ns += 999999984; + } + + set_normalized_timespec64(ts, s, ns); + return 0; +} + +static int lan966x_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta) +{ + struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info); + struct lan966x *lan966x = phc->lan966x; + + if (delta > -(NSEC_PER_SEC / 2) && delta < (NSEC_PER_SEC / 2)) { + unsigned long flags; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + + /* Must be in IDLE mode before the time can be loaded */ + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(TOD_ACC_PIN)); + + lan_wr(PTP_TOD_NSEC_TOD_NSEC_SET(delta), + lan966x, PTP_TOD_NSEC(TOD_ACC_PIN)); + + /* Adjust time with the value of PTP_TOD_NSEC */ + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_DELTA) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(TOD_ACC_PIN)); + + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + } else { + /* Fall back using lan966x_ptp_settime64 which is not exact */ + struct timespec64 ts; + u64 now; + + lan966x_ptp_gettime64(ptp, &ts); + + now = ktime_to_ns(timespec64_to_ktime(ts)); + ts = ns_to_timespec64(now + delta); + + lan966x_ptp_settime64(ptp, &ts); + } + + return 0; +} + +static int lan966x_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin, + enum ptp_pin_function func, unsigned int chan) +{ + struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info); + struct lan966x *lan966x = phc->lan966x; + struct ptp_clock_info *info; + int i; + + /* Currently support only 1 channel */ + if (chan != 0) + return -1; + + switch (func) { + case PTP_PF_NONE: + case PTP_PF_PEROUT: + case PTP_PF_EXTTS: + break; + default: + return -1; + } + + /* The PTP pins are shared by all the PHC. So it is required to see if + * the pin is connected to another PHC. The pin is connected to another + * PHC if that pin already has a function on that PHC. + */ + for (i = 0; i < LAN966X_PHC_COUNT; ++i) { + info = &lan966x->phc[i].info; + + /* Ignore the check with ourself */ + if (ptp == info) + continue; + + if (info->pin_config[pin].func == PTP_PF_PEROUT || + info->pin_config[pin].func == PTP_PF_EXTTS) + return -1; + } + + return 0; +} + +static int lan966x_ptp_perout(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info); + struct lan966x *lan966x = phc->lan966x; + struct timespec64 ts_phase, ts_period; + unsigned long flags; + s64 wf_high, wf_low; + bool pps = false; + int pin; + + if (rq->perout.flags & ~(PTP_PEROUT_DUTY_CYCLE | + PTP_PEROUT_PHASE)) + return -EOPNOTSUPP; + + pin = ptp_find_pin(phc->clock, PTP_PF_PEROUT, rq->perout.index); + if (pin == -1 || pin >= LAN966X_PHC_PINS_NUM) + return -EINVAL; + + if (!on) { + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_IDLE) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(pin)); + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + return 0; + } + + if (rq->perout.period.sec == 1 && + rq->perout.period.nsec == 0) + pps = true; + + if (rq->perout.flags & PTP_PEROUT_PHASE) { + ts_phase.tv_sec = rq->perout.phase.sec; + ts_phase.tv_nsec = rq->perout.phase.nsec; + } else { + ts_phase.tv_sec = rq->perout.start.sec; + ts_phase.tv_nsec = rq->perout.start.nsec; + } + + if (ts_phase.tv_sec || (ts_phase.tv_nsec && !pps)) { + dev_warn(lan966x->dev, + "Absolute time not supported!\n"); + return -EINVAL; + } + + if (rq->perout.flags & PTP_PEROUT_DUTY_CYCLE) { + struct timespec64 ts_on; + + ts_on.tv_sec = rq->perout.on.sec; + ts_on.tv_nsec = rq->perout.on.nsec; + + wf_high = timespec64_to_ns(&ts_on); + } else { + wf_high = 5000; + } + + if (pps) { + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + lan_wr(PTP_WF_LOW_PERIOD_PIN_WFL(ts_phase.tv_nsec), + lan966x, PTP_WF_LOW_PERIOD(pin)); + lan_wr(PTP_WF_HIGH_PERIOD_PIN_WFH(wf_high), + lan966x, PTP_WF_HIGH_PERIOD(pin)); + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_CLOCK) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(3), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(pin)); + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + return 0; + } + + ts_period.tv_sec = rq->perout.period.sec; + ts_period.tv_nsec = rq->perout.period.nsec; + + wf_low = timespec64_to_ns(&ts_period); + wf_low -= wf_high; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + lan_wr(PTP_WF_LOW_PERIOD_PIN_WFL(wf_low), + lan966x, PTP_WF_LOW_PERIOD(pin)); + lan_wr(PTP_WF_HIGH_PERIOD_PIN_WFH(wf_high), + lan966x, PTP_WF_HIGH_PERIOD(pin)); + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_CLOCK) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SYNC_SET(0), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SYNC, + lan966x, PTP_PIN_CFG(pin)); + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + + return 0; +} + +static int lan966x_ptp_extts(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + struct lan966x_phc *phc = container_of(ptp, struct lan966x_phc, info); + struct lan966x *lan966x = phc->lan966x; + unsigned long flags; + int pin; + u32 val; + + if (lan966x->ptp_ext_irq <= 0) + return -EOPNOTSUPP; + + /* Reject requests with unsupported flags */ + if (rq->extts.flags & ~(PTP_ENABLE_FEATURE | + PTP_RISING_EDGE | + PTP_STRICT_FLAGS)) + return -EOPNOTSUPP; + + pin = ptp_find_pin(phc->clock, PTP_PF_EXTTS, rq->extts.index); + if (pin == -1 || pin >= LAN966X_PHC_PINS_NUM) + return -EINVAL; + + spin_lock_irqsave(&lan966x->ptp_clock_lock, flags); + lan_rmw(PTP_PIN_CFG_PIN_ACTION_SET(PTP_PIN_ACTION_SAVE) | + PTP_PIN_CFG_PIN_SYNC_SET(on ? 3 : 0) | + PTP_PIN_CFG_PIN_DOM_SET(phc->index) | + PTP_PIN_CFG_PIN_SELECT_SET(pin), + PTP_PIN_CFG_PIN_ACTION | + PTP_PIN_CFG_PIN_SYNC | + PTP_PIN_CFG_PIN_DOM | + PTP_PIN_CFG_PIN_SELECT, + lan966x, PTP_PIN_CFG(pin)); + + val = lan_rd(lan966x, PTP_PIN_INTR_ENA); + if (on) + val |= BIT(pin); + else + val &= ~BIT(pin); + lan_wr(val, lan966x, PTP_PIN_INTR_ENA); + + spin_unlock_irqrestore(&lan966x->ptp_clock_lock, flags); + + return 0; +} + +static int lan966x_ptp_enable(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + switch (rq->type) { + case PTP_CLK_REQ_PEROUT: + return lan966x_ptp_perout(ptp, rq, on); + case PTP_CLK_REQ_EXTTS: + return lan966x_ptp_extts(ptp, rq, on); + default: + return -EOPNOTSUPP; + } + + return 0; +} + +static struct ptp_clock_info lan966x_ptp_clock_info = { + .owner = THIS_MODULE, + .name = "lan966x ptp", + .max_adj = 200000, + .gettime64 = lan966x_ptp_gettime64, + .settime64 = lan966x_ptp_settime64, + .adjtime = lan966x_ptp_adjtime, + .adjfine = lan966x_ptp_adjfine, + .verify = lan966x_ptp_verify, + .enable = lan966x_ptp_enable, + .n_per_out = LAN966X_PHC_PINS_NUM, + .n_ext_ts = LAN966X_PHC_PINS_NUM, + .n_pins = LAN966X_PHC_PINS_NUM, +}; + +static int lan966x_ptp_phc_init(struct lan966x *lan966x, + int index, + struct ptp_clock_info *clock_info) +{ + struct lan966x_phc *phc = &lan966x->phc[index]; + struct ptp_pin_desc *p; + int i; + + for (i = 0; i < LAN966X_PHC_PINS_NUM; i++) { + p = &phc->pins[i]; + + snprintf(p->name, sizeof(p->name), "pin%d", i); + p->index = i; + p->func = PTP_PF_NONE; + } + + phc->info = *clock_info; + phc->info.pin_config = &phc->pins[0]; + phc->clock = ptp_clock_register(&phc->info, lan966x->dev); + if (IS_ERR(phc->clock)) + return PTR_ERR(phc->clock); + + phc->index = index; + phc->lan966x = lan966x; + + /* PTP Rx stamping is always enabled. */ + phc->hwtstamp_config.rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT; + + return 0; +} + +int lan966x_ptp_init(struct lan966x *lan966x) +{ + u64 tod_adj = lan966x_ptp_get_nominal_value(); + struct lan966x_port *port; + int err, i; + + if (!lan966x->ptp) + return 0; + + for (i = 0; i < LAN966X_PHC_COUNT; ++i) { + err = lan966x_ptp_phc_init(lan966x, i, &lan966x_ptp_clock_info); + if (err) + return err; + } + + spin_lock_init(&lan966x->ptp_clock_lock); + spin_lock_init(&lan966x->ptp_ts_id_lock); + mutex_init(&lan966x->ptp_lock); + + /* Disable master counters */ + lan_wr(PTP_DOM_CFG_ENA_SET(0), lan966x, PTP_DOM_CFG); + + /* Configure the nominal TOD increment per clock cycle */ + lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(0x7), + PTP_DOM_CFG_CLKCFG_DIS, + lan966x, PTP_DOM_CFG); + + for (i = 0; i < LAN966X_PHC_COUNT; ++i) { + lan_wr((u32)tod_adj & 0xFFFFFFFF, lan966x, + PTP_CLK_PER_CFG(i, 0)); + lan_wr((u32)(tod_adj >> 32), lan966x, + PTP_CLK_PER_CFG(i, 1)); + } + + lan_rmw(PTP_DOM_CFG_CLKCFG_DIS_SET(0), + PTP_DOM_CFG_CLKCFG_DIS, + lan966x, PTP_DOM_CFG); + + /* Enable master counters */ + lan_wr(PTP_DOM_CFG_ENA_SET(0x7), lan966x, PTP_DOM_CFG); + + for (i = 0; i < lan966x->num_phys_ports; i++) { + port = lan966x->ports[i]; + if (!port) + continue; + + skb_queue_head_init(&port->tx_skbs); + } + + return 0; +} + +void lan966x_ptp_deinit(struct lan966x *lan966x) +{ + struct lan966x_port *port; + int i; + + for (i = 0; i < lan966x->num_phys_ports; i++) { + port = lan966x->ports[i]; + if (!port) + continue; + + skb_queue_purge(&port->tx_skbs); + } + + for (i = 0; i < LAN966X_PHC_COUNT; ++i) + ptp_clock_unregister(lan966x->phc[i].clock); +} + +void lan966x_ptp_rxtstamp(struct lan966x *lan966x, struct sk_buff *skb, + u64 timestamp) +{ + struct skb_shared_hwtstamps *shhwtstamps; + struct lan966x_phc *phc; + struct timespec64 ts; + u64 full_ts_in_ns; + + if (!lan966x->ptp) + return; + + phc = &lan966x->phc[LAN966X_PHC_PORT]; + lan966x_ptp_gettime64(&phc->info, &ts); + + /* Drop the sub-ns precision */ + timestamp = timestamp >> 2; + if (ts.tv_nsec < timestamp) + ts.tv_sec--; + ts.tv_nsec = timestamp; + full_ts_in_ns = ktime_set(ts.tv_sec, ts.tv_nsec); + + shhwtstamps = skb_hwtstamps(skb); + shhwtstamps->hwtstamp = full_ts_in_ns; +} + +u32 lan966x_ptp_get_period_ps(void) +{ + /* This represents the system clock period in picoseconds */ + return 15125; +} |