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-rw-r--r--drivers/net/ethernet/microchip/lan966x/lan966x_main.c17
-rw-r--r--drivers/net/ethernet/microchip/lan966x/lan966x_main.h2
-rw-r--r--drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c109
3 files changed, 127 insertions, 1 deletions
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
index afec115e46eb..6579c7062aa5 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.c
@@ -692,6 +692,9 @@ static void lan966x_cleanup_ports(struct lan966x *lan966x)
if (lan966x->ptp_irq)
devm_free_irq(lan966x->dev, lan966x->ptp_irq, lan966x);
+
+ if (lan966x->ptp_ext_irq)
+ devm_free_irq(lan966x->dev, lan966x->ptp_ext_irq, lan966x);
}
static int lan966x_probe_port(struct lan966x *lan966x, u32 p,
@@ -1058,6 +1061,20 @@ static int lan966x_probe(struct platform_device *pdev)
lan966x->fdma = true;
}
+ if (lan966x->ptp) {
+ lan966x->ptp_ext_irq = platform_get_irq_byname(pdev, "ptp-ext");
+ if (lan966x->ptp_ext_irq > 0) {
+ err = devm_request_threaded_irq(&pdev->dev,
+ lan966x->ptp_ext_irq, NULL,
+ lan966x_ptp_ext_irq_handler,
+ IRQF_ONESHOT,
+ "ptp-ext irq", lan966x);
+ if (err)
+ return dev_err_probe(&pdev->dev, err,
+ "Unable to use ptp-ext irq");
+ }
+ }
+
/* init switch */
lan966x_init(lan966x);
lan966x_stats_init(lan966x);
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
index 76255e2a86f3..3b86ddddc756 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_main.h
@@ -233,6 +233,7 @@ struct lan966x {
int ana_irq;
int ptp_irq;
int fdma_irq;
+ int ptp_ext_irq;
/* worqueue for fdb */
struct workqueue_struct *fdb_work;
@@ -394,6 +395,7 @@ int lan966x_ptp_txtstamp_request(struct lan966x_port *port,
void lan966x_ptp_txtstamp_release(struct lan966x_port *port,
struct sk_buff *skb);
irqreturn_t lan966x_ptp_irq_handler(int irq, void *args);
+irqreturn_t lan966x_ptp_ext_irq_handler(int irq, void *args);
int lan966x_fdma_xmit(struct sk_buff *skb, __be32 *ifh, struct net_device *dev);
int lan966x_fdma_change_mtu(struct lan966x *lan966x);
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
index 3199a266ed3d..3a621c5165bc 100644
--- a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
+++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c
@@ -321,6 +321,63 @@ irqreturn_t lan966x_ptp_irq_handler(int irq, void *args)
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);
@@ -508,6 +565,7 @@ static int lan966x_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
switch (func) {
case PTP_PF_NONE:
case PTP_PF_PEROUT:
+ case PTP_PF_EXTTS:
break;
default:
return -1;
@@ -524,7 +582,8 @@ static int lan966x_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin,
if (ptp == info)
continue;
- if (info->pin_config[pin].func == PTP_PF_PEROUT)
+ if (info->pin_config[pin].func == PTP_PF_PEROUT ||
+ info->pin_config[pin].func == PTP_PF_EXTTS)
return -1;
}
@@ -632,12 +691,59 @@ static int lan966x_ptp_perout(struct ptp_clock_info *ptp,
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;
}
@@ -656,6 +762,7 @@ static struct ptp_clock_info lan966x_ptp_clock_info = {
.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,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 14:03:44 +0000