diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c index d291612eeafb..074e2cdfb0fa 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c @@ -12,8 +12,11 @@ #include <linux/io.h> #include <linux/iopoll.h> #include <linux/delay.h> +#include <linux/ptp_clock_kernel.h> #include "common.h" #include "stmmac_ptp.h" +#include "dwmac4.h" +#include "stmmac.h" static void config_hw_tstamping(void __iomem *ioaddr, u32 data) { @@ -153,6 +156,51 @@ static void get_systime(void __iomem *ioaddr, u64 *systime) *systime = ns; } +static void get_ptptime(void __iomem *ptpaddr, u64 *ptp_time) +{ + u64 ns; + + ns = readl(ptpaddr + PTP_ATNR); + ns += readl(ptpaddr + PTP_ATSR) * NSEC_PER_SEC; + + *ptp_time = ns; +} + +static void timestamp_interrupt(struct stmmac_priv *priv) +{ + u32 num_snapshot, ts_status, tsync_int; + struct ptp_clock_event event; + unsigned long flags; + u64 ptp_time; + int i; + + tsync_int = readl(priv->ioaddr + GMAC_INT_STATUS) & GMAC_INT_TSIE; + + if (!tsync_int) + return; + + /* Read timestamp status to clear interrupt from either external + * timestamp or start/end of PPS. + */ + ts_status = readl(priv->ioaddr + GMAC_TIMESTAMP_STATUS); + + if (!priv->plat->ext_snapshot_en) + return; + + num_snapshot = (ts_status & GMAC_TIMESTAMP_ATSNS_MASK) >> + GMAC_TIMESTAMP_ATSNS_SHIFT; + + for (i = 0; i < num_snapshot; i++) { + spin_lock_irqsave(&priv->ptp_lock, flags); + get_ptptime(priv->ptpaddr, &ptp_time); + spin_unlock_irqrestore(&priv->ptp_lock, flags); + event.type = PTP_CLOCK_EXTTS; + event.index = 0; + event.timestamp = ptp_time; + ptp_clock_event(priv->ptp_clock, &event); + } +} + const struct stmmac_hwtimestamp stmmac_ptp = { .config_hw_tstamping = config_hw_tstamping, .init_systime = init_systime, @@ -160,4 +208,6 @@ const struct stmmac_hwtimestamp stmmac_ptp = { .config_addend = config_addend, .adjust_systime = adjust_systime, .get_systime = get_systime, + .get_ptptime = get_ptptime, + .timestamp_interrupt = timestamp_interrupt, }; |