diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c | 43 |
1 files changed, 34 insertions, 9 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c index a77f68918010..10d6059b2f26 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_hwtstamp.c @@ -34,21 +34,29 @@ static void stmmac_config_hw_tstamping(void __iomem *ioaddr, u32 data) } static u32 stmmac_config_sub_second_increment(void __iomem *ioaddr, - u32 ptp_clock) + u32 ptp_clock, int gmac4) { u32 value = readl(ioaddr + PTP_TCR); unsigned long data; - /* Convert the ptp_clock to nano second - * formula = (2/ptp_clock) * 1000000000 - * where, ptp_clock = 50MHz. + /* For GMAC3.x, 4.x versions, convert the ptp_clock to nano second + * formula = (1/ptp_clock) * 1000000000 + * where ptp_clock is 50MHz if fine method is used to update system */ - data = (2000000000ULL / ptp_clock); + if (value & PTP_TCR_TSCFUPDT) + data = (1000000000ULL / 50000000); + else + data = (1000000000ULL / ptp_clock); /* 0.465ns accuracy */ if (!(value & PTP_TCR_TSCTRLSSR)) data = (data * 1000) / 465; + data &= PTP_SSIR_SSINC_MASK; + + if (gmac4) + data = data << GMAC4_PTP_SSIR_SSINC_SHIFT; + writel(data, ioaddr + PTP_SSIR); return data; @@ -104,14 +112,30 @@ static int stmmac_config_addend(void __iomem *ioaddr, u32 addend) } static int stmmac_adjust_systime(void __iomem *ioaddr, u32 sec, u32 nsec, - int add_sub) + int add_sub, int gmac4) { u32 value; int limit; + if (add_sub) { + /* If the new sec value needs to be subtracted with + * the system time, then MAC_STSUR reg should be + * programmed with (2^32 – <new_sec_value>) + */ + if (gmac4) + sec = (100000000ULL - sec); + + value = readl(ioaddr + PTP_TCR); + if (value & PTP_TCR_TSCTRLSSR) + nsec = (PTP_DIGITAL_ROLLOVER_MODE - nsec); + else + nsec = (PTP_BINARY_ROLLOVER_MODE - nsec); + } + writel(sec, ioaddr + PTP_STSUR); - writel(((add_sub << PTP_STNSUR_ADDSUB_SHIFT) | nsec), - ioaddr + PTP_STNSUR); + value = (add_sub << PTP_STNSUR_ADDSUB_SHIFT) | nsec; + writel(value, ioaddr + PTP_STNSUR); + /* issue command to initialize the system time value */ value = readl(ioaddr + PTP_TCR); value |= PTP_TCR_TSUPDT; @@ -134,8 +158,9 @@ static u64 stmmac_get_systime(void __iomem *ioaddr) { u64 ns; + /* Get the TSSS value */ ns = readl(ioaddr + PTP_STNSR); - /* convert sec time value to nanosecond */ + /* Get the TSS and convert sec time value to nanosecond */ ns += readl(ioaddr + PTP_STSR) * 1000000000ULL; return ns; |