Hi,
This is the PTP support for TJA1103.
The RX timestamp is found in the reserved2 field of the PTP package.
The TX timestamp has to be read from the phy registers. Reading of the
timestamp works with interrupts or with polling(that starts when
.nxp_c45_txtstamp is called).
The implementation of .adjtime is done by read modify write because there
is no way to atomically add/subtract a constant from the clock value.
I've moved scaled_ppm_to_ppb function from ptp_clock.c to
ptp_clock_kernel.h in order to be able to build the driver without
PTP_1588_CLOCK=y.
Radu P.
Changes v2:
- added unlocked version for the functions nxp_c45_ptp_settime64 and
nxp_c45_ptp_gettimex64
- use only one lock for .gettimex64 and .settime64
- added the same lock for .adjfine, .adjtime and nxp_c45_get_hwtxts
- moved the reading of the hw ts outside of the loop where the RX ts are
reconstructed
Radu Pirea (NXP OSS) (2):
ptp: ptp_clock: make scaled_ppm_to_ppb static inline
phy: nxp-c45-tja11xx: add timestamping support
drivers/net/phy/nxp-c45-tja11xx.c | 531 +++++++++++++++++++++++++++++-
drivers/ptp/ptp_clock.c | 21 --
include/linux/ptp_clock_kernel.h | 34 +-
3 files changed, 556 insertions(+), 30 deletions(-)
--
2.31.1
Make scaled_ppm_to_ppb static inline to be able to build drivers that
use this function even with PTP_1588_CLOCK disabled.
Signed-off-by: Radu Pirea (NXP OSS) <[email protected]>
---
drivers/ptp/ptp_clock.c | 21 --------------------
include/linux/ptp_clock_kernel.h | 34 ++++++++++++++++++++++++--------
2 files changed, 26 insertions(+), 29 deletions(-)
diff --git a/drivers/ptp/ptp_clock.c b/drivers/ptp/ptp_clock.c
index 03a246e60fd9..a780435331c8 100644
--- a/drivers/ptp/ptp_clock.c
+++ b/drivers/ptp/ptp_clock.c
@@ -63,27 +63,6 @@ static void enqueue_external_timestamp(struct timestamp_event_queue *queue,
spin_unlock_irqrestore(&queue->lock, flags);
}
-s32 scaled_ppm_to_ppb(long ppm)
-{
- /*
- * The 'freq' field in the 'struct timex' is in parts per
- * million, but with a 16 bit binary fractional field.
- *
- * We want to calculate
- *
- * ppb = scaled_ppm * 1000 / 2^16
- *
- * which simplifies to
- *
- * ppb = scaled_ppm * 125 / 2^13
- */
- s64 ppb = 1 + ppm;
- ppb *= 125;
- ppb >>= 13;
- return (s32) ppb;
-}
-EXPORT_SYMBOL(scaled_ppm_to_ppb);
-
/* posix clock implementation */
static int ptp_clock_getres(struct posix_clock *pc, struct timespec64 *tp)
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h
index 0d47fd33b228..a311bddd9e85 100644
--- a/include/linux/ptp_clock_kernel.h
+++ b/include/linux/ptp_clock_kernel.h
@@ -186,6 +186,32 @@ struct ptp_clock_event {
};
};
+/**
+ * scaled_ppm_to_ppb() - convert scaled ppm to ppb
+ *
+ * @ppm: Parts per million, but with a 16 bit binary fractional field
+ */
+static inline s32 scaled_ppm_to_ppb(long ppm)
+{
+ /*
+ * The 'freq' field in the 'struct timex' is in parts per
+ * million, but with a 16 bit binary fractional field.
+ *
+ * We want to calculate
+ *
+ * ppb = scaled_ppm * 1000 / 2^16
+ *
+ * which simplifies to
+ *
+ * ppb = scaled_ppm * 125 / 2^13
+ */
+ s64 ppb = 1 + ppm;
+
+ ppb *= 125;
+ ppb >>= 13;
+ return (s32)ppb;
+}
+
#if IS_REACHABLE(CONFIG_PTP_1588_CLOCK)
/**
@@ -229,14 +255,6 @@ extern void ptp_clock_event(struct ptp_clock *ptp,
extern int ptp_clock_index(struct ptp_clock *ptp);
-/**
- * scaled_ppm_to_ppb() - convert scaled ppm to ppb
- *
- * @ppm: Parts per million, but with a 16 bit binary fractional field
- */
-
-extern s32 scaled_ppm_to_ppb(long ppm);
-
/**
* ptp_find_pin() - obtain the pin index of a given auxiliary function
*
--
2.31.1
Add mii_timestamper interface and register a ptp clock.
The package timestamping can work with or without interrupts.
RX timestamps are received in the reserved field of the PTP package.
TX timestamps are read via MDIO from a set of registers.
Signed-off-by: Radu Pirea (NXP OSS) <[email protected]>
---
drivers/net/phy/nxp-c45-tja11xx.c | 531 +++++++++++++++++++++++++++++-
1 file changed, 530 insertions(+), 1 deletion(-)
diff --git a/drivers/net/phy/nxp-c45-tja11xx.c b/drivers/net/phy/nxp-c45-tja11xx.c
index 26b9c0d7cb9d..512e4cb5d2c2 100644
--- a/drivers/net/phy/nxp-c45-tja11xx.c
+++ b/drivers/net/phy/nxp-c45-tja11xx.c
@@ -13,6 +13,9 @@
#include <linux/phy.h>
#include <linux/processor.h>
#include <linux/property.h>
+#include <linux/ptp_classify.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/net_tstamp.h>
#define PHY_ID_TJA_1103 0x001BB010
@@ -57,6 +60,9 @@
#define VEND1_PORT_CONTROL 0x8040
#define PORT_CONTROL_EN BIT(14)
+#define VEND1_PORT_ABILITIES 0x8046
+#define PTP_ABILITY BIT(3)
+
#define VEND1_PORT_INFRA_CONTROL 0xAC00
#define PORT_INFRA_CONTROL_EN BIT(14)
@@ -91,13 +97,106 @@
#define VEND1_TX_IPG_LENGTH 0xAFD1
#define COUNTER_EN BIT(15)
+#define VEND1_LTC_LOAD_CTRL 0x1105
+#define READ_LTC BIT(2)
+#define LOAD_LTC BIT(0)
+
+#define VEND1_LTC_WR_NSEC_0 0x1106
+#define VEND1_LTC_WR_NSEC_1 0x1107
+#define VEND1_LTC_WR_SEC_0 0x1108
+#define VEND1_LTC_WR_SEC_1 0x1109
+
+#define VEND1_LTC_RD_NSEC_0 0x110A
+#define VEND1_LTC_RD_NSEC_1 0x110B
+#define VEND1_LTC_RD_SEC_0 0x110C
+#define VEND1_LTC_RD_SEC_1 0x110D
+
+#define VEND1_RATE_ADJ_SUBNS_0 0x110F
+#define VEND1_RATE_ADJ_SUBNS_1 0x1110
+#define CLK_RATE_ADJ_LD BIT(15)
+#define CLK_RATE_ADJ_DIR BIT(14)
+
+#define VEND1_HW_LTC_LOCK_CTRL 0x1115
+#define HW_LTC_LOCK_EN BIT(0)
+
+#define VEND1_PTP_IRQ_EN 0x1131
+#define VEND1_PTP_IRQ_STATUS 0x1132
+#define PTP_IRQ_EGR_TS BIT(0)
+
+#define VEND1_RX_TS_INSRT_CTRL 0x114D
+#define RX_TS_INSRT_MODE2 0x02
+
+#define VEND1_EGR_RING_DATA_0 0x114E
+#define VEND1_EGR_RING_DATA_1_SEQ_ID 0x114F
+#define VEND1_EGR_RING_DATA_2_NSEC_15_0 0x1150
+#define VEND1_EGR_RING_DATA_3 0x1151
+#define VEND1_EGR_RING_CTRL 0x1154
+
+#define RING_DATA_0_DOMAIN_NUMBER GENMASK(7, 0)
+#define RING_DATA_0_MSG_TYPE GENMASK(11, 8)
+#define RING_DATA_0_SEC_4_2 GENMASK(14, 2)
+#define RING_DATA_0_TS_VALID BIT(15)
+
+#define RING_DATA_3_NSEC_29_16 GENMASK(13, 0)
+#define RING_DATA_3_SEC_1_0 GENMASK(15, 14)
+#define RING_DATA_5_SEC_16_5 GENMASK(15, 4)
+#define RING_DONE BIT(0)
+
+#define TS_SEC_MASK GENMASK(1, 0)
+
+#define VEND1_PORT_FUNC_ENABLES 0x8048
+#define PTP_ENABLE BIT(3)
+
+#define VEND1_PORT_PTP_CONTROL 0x9000
+#define PORT_PTP_CONTROL_BYPASS BIT(11)
+
+#define VEND1_PTP_CLK_PERIOD 0x1104
+#define PTP_CLK_PERIOD_100BT1 15ULL
+
+#define VEND1_EVENT_MSG_FILT 0x1148
+#define EVENT_MSG_FILT_ALL 0x0F
+#define EVENT_MSG_FILT_NONE 0x00
+
+#define VEND1_TX_PIPE_DLY_NS 0x1149
+#define VEND1_TX_PIPEDLY_SUBNS 0x114A
+#define VEND1_RX_PIPE_DLY_NS 0x114B
+#define VEND1_RX_PIPEDLY_SUBNS 0x114C
+
#define RGMII_PERIOD_PS 8000U
#define PS_PER_DEGREE div_u64(RGMII_PERIOD_PS, 360)
#define MIN_ID_PS 1644U
#define MAX_ID_PS 2260U
#define DEFAULT_ID_PS 2000U
+#define PPM_TO_SUBNS_INC(ppb) div_u64(GENMASK(31, 0) * (ppb) * \
+ PTP_CLK_PERIOD_100BT1, NSEC_PER_SEC)
+
+#define NXP_C45_SKB_CB(skb) ((struct nxp_c45_skb_cb *)(skb)->cb)
+
+struct nxp_c45_skb_cb {
+ struct ptp_header *header;
+ unsigned int type;
+};
+
+struct nxp_c45_hwts {
+ u32 nsec;
+ u32 sec;
+ u8 domain_number;
+ u16 sequence_id;
+ u8 msg_type;
+};
+
struct nxp_c45_phy {
+ struct phy_device *phydev;
+ struct mii_timestamper mii_ts;
+ struct ptp_clock *ptp_clock;
+ struct ptp_clock_info caps;
+ struct sk_buff_head tx_queue;
+ struct sk_buff_head rx_queue;
+ /* used to access the PTP registers atomic */
+ struct mutex ptp_lock;
+ int hwts_tx;
+ int hwts_rx;
u32 tx_delay;
u32 rx_delay;
};
@@ -110,6 +209,382 @@ struct nxp_c45_phy_stats {
u16 mask;
};
+static bool nxp_c45_poll_txts(struct phy_device *phydev)
+{
+ return phydev->irq <= 0;
+}
+
+static int _nxp_c45_ptp_gettimex64(struct ptp_clock_info *ptp,
+ struct timespec64 *ts,
+ struct ptp_system_timestamp *sts)
+{
+ struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps);
+
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_LTC_LOAD_CTRL,
+ READ_LTC);
+ ts->tv_nsec = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1,
+ VEND1_LTC_RD_NSEC_0);
+ ts->tv_nsec |= phy_read_mmd(priv->phydev, MDIO_MMD_VEND1,
+ VEND1_LTC_RD_NSEC_1) << 16;
+ ts->tv_sec = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1,
+ VEND1_LTC_RD_SEC_0);
+ ts->tv_sec |= phy_read_mmd(priv->phydev, MDIO_MMD_VEND1,
+ VEND1_LTC_RD_SEC_1) << 16;
+
+ return 0;
+}
+
+static int nxp_c45_ptp_gettimex64(struct ptp_clock_info *ptp,
+ struct timespec64 *ts,
+ struct ptp_system_timestamp *sts)
+{
+ struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps);
+
+ mutex_lock(&priv->ptp_lock);
+ _nxp_c45_ptp_gettimex64(ptp, ts, sts);
+ mutex_unlock(&priv->ptp_lock);
+
+ return 0;
+}
+
+static int _nxp_c45_ptp_settime64(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps);
+
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_LTC_WR_NSEC_0,
+ ts->tv_nsec);
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_LTC_WR_NSEC_1,
+ ts->tv_nsec >> 16);
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_LTC_WR_SEC_0,
+ ts->tv_sec);
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_LTC_WR_SEC_1,
+ ts->tv_sec >> 16);
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_LTC_LOAD_CTRL,
+ LOAD_LTC);
+
+ return 0;
+}
+
+static int nxp_c45_ptp_settime64(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps);
+
+ mutex_lock(&priv->ptp_lock);
+ _nxp_c45_ptp_settime64(ptp, ts);
+ mutex_unlock(&priv->ptp_lock);
+
+ return 0;
+}
+
+static int nxp_c45_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+ struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps);
+ s32 ppb = scaled_ppm_to_ppb(scaled_ppm);
+ u64 subns_inc_val;
+ bool inc;
+
+ mutex_lock(&priv->ptp_lock);
+ inc = ppb >= 0;
+ ppb = abs(ppb);
+
+ subns_inc_val = PPM_TO_SUBNS_INC(ppb);
+
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_RATE_ADJ_SUBNS_0,
+ subns_inc_val);
+ subns_inc_val >>= 16;
+ subns_inc_val |= CLK_RATE_ADJ_LD;
+ if (inc)
+ subns_inc_val |= CLK_RATE_ADJ_DIR;
+
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_RATE_ADJ_SUBNS_1,
+ subns_inc_val);
+ mutex_unlock(&priv->ptp_lock);
+
+ return 0;
+}
+
+static int nxp_c45_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps);
+ struct timespec64 now, then;
+
+ mutex_lock(&priv->ptp_lock);
+ then = ns_to_timespec64(delta);
+ _nxp_c45_ptp_gettimex64(ptp, &now, NULL);
+ now = timespec64_add(now, then);
+ _nxp_c45_ptp_settime64(ptp, &now);
+ mutex_unlock(&priv->ptp_lock);
+
+ return 0;
+}
+
+static void nxp_c45_reconstruct_ts(struct timespec64 *ts,
+ struct nxp_c45_hwts *hwts)
+{
+ ts->tv_nsec = hwts->nsec;
+ if ((ts->tv_sec & TS_SEC_MASK) < (hwts->sec & TS_SEC_MASK))
+ ts->tv_sec -= BIT(2);
+ ts->tv_sec &= ~TS_SEC_MASK;
+ ts->tv_sec |= hwts->sec & TS_SEC_MASK;
+}
+
+static bool nxp_c45_match_ts(struct ptp_header *header,
+ struct nxp_c45_hwts *hwts,
+ unsigned int type)
+{
+ return ntohs(header->sequence_id) == hwts->sequence_id &&
+ ptp_get_msgtype(header, type) == hwts->msg_type &&
+ header->domain_number == hwts->domain_number;
+}
+
+static bool nxp_c45_get_hwtxts(struct nxp_c45_phy *priv,
+ struct nxp_c45_hwts *hwts)
+{
+ bool valid;
+ u16 reg;
+
+ mutex_lock(&priv->ptp_lock);
+ phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_EGR_RING_CTRL,
+ RING_DONE);
+ reg = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_EGR_RING_DATA_0);
+ valid = !!(reg & RING_DATA_0_TS_VALID);
+ if (!valid)
+ goto nxp_c45_get_hwtxts_out;
+
+ hwts->domain_number = reg;
+ hwts->msg_type = (reg & RING_DATA_0_MSG_TYPE) >> 8;
+ hwts->sec = (reg & RING_DATA_0_SEC_4_2) >> 10;
+ hwts->sequence_id = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1,
+ VEND1_EGR_RING_DATA_1_SEQ_ID);
+ hwts->nsec = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1,
+ VEND1_EGR_RING_DATA_2_NSEC_15_0);
+ reg = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_EGR_RING_DATA_3);
+ hwts->nsec |= (reg & RING_DATA_3_NSEC_29_16) << 16;
+ hwts->sec |= (reg & RING_DATA_3_SEC_1_0) >> 14;
+
+nxp_c45_get_hwtxts_out:
+ mutex_unlock(&priv->ptp_lock);
+ return valid;
+}
+
+static void nxp_c45_process_txts(struct nxp_c45_phy *priv,
+ struct nxp_c45_hwts *txts)
+{
+ struct sk_buff *skb, *tmp, *skb_match = NULL;
+ struct skb_shared_hwtstamps shhwtstamps;
+ struct timespec64 ts;
+ unsigned long flags;
+ bool ts_match;
+ s64 ts_ns;
+
+ spin_lock_irqsave(&priv->tx_queue.lock, flags);
+ skb_queue_walk_safe(&priv->tx_queue, skb, tmp) {
+ ts_match = nxp_c45_match_ts(NXP_C45_SKB_CB(skb)->header, txts,
+ NXP_C45_SKB_CB(skb)->type);
+ if (!ts_match)
+ continue;
+ skb_match = skb;
+ __skb_unlink(skb, &priv->tx_queue);
+ break;
+ }
+ spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
+
+ if (skb_match) {
+ nxp_c45_ptp_gettimex64(&priv->caps, &ts, NULL);
+ nxp_c45_reconstruct_ts(&ts, txts);
+ memset(&shhwtstamps, 0, sizeof(shhwtstamps));
+ ts_ns = timespec64_to_ns(&ts);
+ shhwtstamps.hwtstamp = ns_to_ktime(ts_ns);
+ skb_complete_tx_timestamp(skb_match, &shhwtstamps);
+ } else {
+ phydev_warn(priv->phydev,
+ "the tx timestamp doesn't match with any skb\n");
+ }
+}
+
+static long nxp_c45_do_aux_work(struct ptp_clock_info *ptp)
+{
+ struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps);
+ bool poll_txts = nxp_c45_poll_txts(priv->phydev);
+ struct skb_shared_hwtstamps *shhwtstamps_rx;
+ struct nxp_c45_hwts hwts;
+ bool reschedule = false;
+ struct timespec64 ts;
+ struct sk_buff *skb;
+ bool txts_valid;
+ u32 ts_raw;
+
+ while (!skb_queue_empty_lockless(&priv->tx_queue) && poll_txts) {
+ txts_valid = nxp_c45_get_hwtxts(priv, &hwts);
+ if (unlikely(!txts_valid)) {
+ /* Still more skbs in the queue */
+ reschedule = true;
+ break;
+ }
+
+ nxp_c45_process_txts(priv, &hwts);
+ }
+
+ nxp_c45_ptp_gettimex64(&priv->caps, &ts, NULL);
+ while ((skb = skb_dequeue(&priv->rx_queue)) != NULL) {
+ ts_raw = __be32_to_cpu(NXP_C45_SKB_CB(skb)->header->reserved2);
+ hwts.sec = ts_raw >> 30;
+ hwts.nsec = ts_raw & GENMASK(29, 0);
+ nxp_c45_reconstruct_ts(&ts, &hwts);
+ shhwtstamps_rx = skb_hwtstamps(skb);
+ shhwtstamps_rx->hwtstamp = ns_to_ktime(timespec64_to_ns(&ts));
+ NXP_C45_SKB_CB(skb)->header->reserved2 = 0;
+ netif_rx_ni(skb);
+ }
+
+ return reschedule ? 1 : -1;
+}
+
+static int nxp_c45_init_ptp_clock(struct nxp_c45_phy *priv)
+{
+ priv->caps = (struct ptp_clock_info) {
+ .owner = THIS_MODULE,
+ .name = "NXP C45 PHC",
+ .max_adj = 16666666,
+ .adjfine = nxp_c45_ptp_adjfine,
+ .adjtime = nxp_c45_ptp_adjtime,
+ .gettimex64 = nxp_c45_ptp_gettimex64,
+ .settime64 = nxp_c45_ptp_settime64,
+ .do_aux_work = nxp_c45_do_aux_work,
+ };
+
+ priv->ptp_clock = ptp_clock_register(&priv->caps,
+ &priv->phydev->mdio.dev);
+
+ if (IS_ERR(priv->ptp_clock))
+ return PTR_ERR(priv->ptp_clock);
+
+ if (!priv->ptp_clock)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void nxp_c45_txtstamp(struct mii_timestamper *mii_ts,
+ struct sk_buff *skb, int type)
+{
+ struct nxp_c45_phy *priv = container_of(mii_ts, struct nxp_c45_phy,
+ mii_ts);
+
+ switch (priv->hwts_tx) {
+ case HWTSTAMP_TX_ON:
+ NXP_C45_SKB_CB(skb)->type = type;
+ NXP_C45_SKB_CB(skb)->header = ptp_parse_header(skb, type);
+ skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
+ skb_queue_tail(&priv->tx_queue, skb);
+ if (nxp_c45_poll_txts(priv->phydev))
+ ptp_schedule_worker(priv->ptp_clock, 0);
+ break;
+ case HWTSTAMP_TX_OFF:
+ default:
+ kfree_skb(skb);
+ break;
+ }
+}
+
+static bool nxp_c45_rxtstamp(struct mii_timestamper *mii_ts,
+ struct sk_buff *skb, int type)
+{
+ struct nxp_c45_phy *priv = container_of(mii_ts, struct nxp_c45_phy,
+ mii_ts);
+ struct ptp_header *header = ptp_parse_header(skb, type);
+
+ if (!header)
+ return false;
+
+ if (!priv->hwts_rx)
+ return false;
+
+ NXP_C45_SKB_CB(skb)->header = header;
+ skb_queue_tail(&priv->rx_queue, skb);
+ ptp_schedule_worker(priv->ptp_clock, 0);
+
+ return true;
+}
+
+static int nxp_c45_hwtstamp(struct mii_timestamper *mii_ts,
+ struct ifreq *ifreq)
+{
+ struct nxp_c45_phy *priv = container_of(mii_ts, struct nxp_c45_phy,
+ mii_ts);
+ struct phy_device *phydev = priv->phydev;
+ struct hwtstamp_config cfg;
+
+ if (copy_from_user(&cfg, ifreq->ifr_data, sizeof(cfg)))
+ return -EFAULT;
+
+ if (cfg.tx_type < 0 || cfg.tx_type > HWTSTAMP_TX_ON)
+ return -ERANGE;
+
+ priv->hwts_tx = cfg.tx_type;
+
+ switch (cfg.rx_filter) {
+ case HWTSTAMP_FILTER_NONE:
+ priv->hwts_rx = 0;
+ break;
+ case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
+ case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
+ case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
+ priv->hwts_rx = 1;
+ cfg.rx_filter = HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+ break;
+ default:
+ return -ERANGE;
+ }
+
+ if (priv->hwts_rx || priv->hwts_tx) {
+ phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_EVENT_MSG_FILT,
+ EVENT_MSG_FILT_ALL);
+ phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
+ VEND1_PORT_PTP_CONTROL,
+ PORT_PTP_CONTROL_BYPASS);
+ } else {
+ phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_EVENT_MSG_FILT,
+ EVENT_MSG_FILT_NONE);
+ phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, VEND1_PORT_PTP_CONTROL,
+ PORT_PTP_CONTROL_BYPASS);
+ }
+
+ if (nxp_c45_poll_txts(priv->phydev))
+ goto nxp_c45_no_ptp_irq;
+
+ if (priv->hwts_tx)
+ phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
+ VEND1_PTP_IRQ_EN, PTP_IRQ_EGR_TS);
+ else
+ phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
+ VEND1_PTP_IRQ_EN, PTP_IRQ_EGR_TS);
+
+nxp_c45_no_ptp_irq:
+ return copy_to_user(ifreq->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
+}
+
+static int nxp_c45_ts_info(struct mii_timestamper *mii_ts,
+ struct ethtool_ts_info *ts_info)
+{
+ struct nxp_c45_phy *priv = container_of(mii_ts, struct nxp_c45_phy,
+ mii_ts);
+
+ ts_info->so_timestamping = SOF_TIMESTAMPING_TX_HARDWARE |
+ SOF_TIMESTAMPING_RX_HARDWARE |
+ SOF_TIMESTAMPING_RAW_HARDWARE;
+ ts_info->phc_index = ptp_clock_index(priv->ptp_clock);
+ ts_info->tx_types = (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON);
+ ts_info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_L2_SYNC) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ) |
+ (1 << HWTSTAMP_FILTER_PTP_V2_L2_EVENT);
+
+ return 0;
+}
+
static const struct nxp_c45_phy_stats nxp_c45_hw_stats[] = {
{ "phy_symbol_error_cnt", MDIO_MMD_VEND1,
VEND1_SYMBOL_ERROR_COUNTER, 0, GENMASK(15, 0) },
@@ -205,7 +680,9 @@ static int nxp_c45_config_intr(struct phy_device *phydev)
static irqreturn_t nxp_c45_handle_interrupt(struct phy_device *phydev)
{
+ struct nxp_c45_phy *priv = phydev->priv;
irqreturn_t ret = IRQ_NONE;
+ struct nxp_c45_hwts hwts;
int irq;
irq = phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_PHY_IRQ_STATUS);
@@ -216,6 +693,18 @@ static irqreturn_t nxp_c45_handle_interrupt(struct phy_device *phydev)
ret = IRQ_HANDLED;
}
+ /* There is no need for ACK.
+ * The irq signal will be asserted until the EGR TS FIFO will be
+ * emptied.
+ */
+ irq = phy_read_mmd(phydev, MDIO_MMD_VEND1, VEND1_PTP_IRQ_STATUS);
+ if (irq & PTP_IRQ_EGR_TS) {
+ while (nxp_c45_get_hwtxts(priv, &hwts))
+ nxp_c45_process_txts(priv, &hwts);
+
+ ret = IRQ_HANDLED;
+ }
+
return ret;
}
@@ -566,20 +1055,60 @@ static int nxp_c45_config_init(struct phy_device *phydev)
phydev->autoneg = AUTONEG_DISABLE;
+ phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_PTP_CLK_PERIOD,
+ PTP_CLK_PERIOD_100BT1);
+ phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, VEND1_HW_LTC_LOCK_CTRL,
+ HW_LTC_LOCK_EN);
+ phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_RX_TS_INSRT_CTRL,
+ RX_TS_INSRT_MODE2);
+ phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, VEND1_PORT_FUNC_ENABLES,
+ PTP_ENABLE);
+
return nxp_c45_start_op(phydev);
}
static int nxp_c45_probe(struct phy_device *phydev)
{
struct nxp_c45_phy *priv;
+ int ptp_ability;
+ int ret = 0;
priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
+ skb_queue_head_init(&priv->tx_queue);
+ skb_queue_head_init(&priv->rx_queue);
+
+ priv->phydev = phydev;
+
phydev->priv = priv;
- return 0;
+ mutex_init(&priv->ptp_lock);
+
+ ptp_ability = phy_read_mmd(phydev, MDIO_MMD_VEND1,
+ VEND1_PORT_ABILITIES);
+ ptp_ability = !!(ptp_ability & PTP_ABILITY);
+ if (!ptp_ability) {
+ phydev_info(phydev, "the phy does not support PTP");
+ goto no_ptp_support;
+ }
+
+ if (IS_ENABLED(CONFIG_PTP_1588_CLOCK) &&
+ IS_ENABLED(CONFIG_NETWORK_PHY_TIMESTAMPING)) {
+ priv->mii_ts.rxtstamp = nxp_c45_rxtstamp;
+ priv->mii_ts.txtstamp = nxp_c45_txtstamp;
+ priv->mii_ts.hwtstamp = nxp_c45_hwtstamp;
+ priv->mii_ts.ts_info = nxp_c45_ts_info;
+ phydev->mii_ts = &priv->mii_ts;
+ ret = nxp_c45_init_ptp_clock(priv);
+ } else {
+ phydev_dbg(phydev, "PTP support not enabled even if the phy supports it");
+ }
+
+no_ptp_support:
+
+ return ret;
}
static struct phy_driver nxp_c45_driver[] = {
--
2.31.1
Hello:
This series was applied to netdev/net-next.git (refs/heads/master):
On Mon, 10 May 2021 18:34:31 +0300 you wrote:
> Hi,
>
> This is the PTP support for TJA1103.
> The RX timestamp is found in the reserved2 field of the PTP package.
> The TX timestamp has to be read from the phy registers. Reading of the
> timestamp works with interrupts or with polling(that starts when
> .nxp_c45_txtstamp is called).
> The implementation of .adjtime is done by read modify write because there
> is no way to atomically add/subtract a constant from the clock value.
>
> [...]
Here is the summary with links:
- [v2,1/2] ptp: ptp_clock: make scaled_ppm_to_ppb static inline
https://git.kernel.org/netdev/net-next/c/9d9d415f0048
- [v2,2/2] phy: nxp-c45-tja11xx: add timestamping support
https://git.kernel.org/netdev/net-next/c/514def5dd339
You are awesome, thank you!
--
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