diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c index 763b549e3c2d..992294d25706 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c @@ -8,6 +8,7 @@ #include "dwmac-intel.h" #include "dwmac4.h" #include "stmmac.h" +#include "stmmac_ptp.h" #define INTEL_MGBE_ADHOC_ADDR 0x15 #define INTEL_MGBE_XPCS_ADDR 0x16 @@ -240,6 +241,108 @@ static void intel_mgbe_ptp_clk_freq_config(void *npriv) writel(gpio_value, priv->ioaddr + GMAC_GPIO_STATUS); } +static void get_arttime(struct mii_bus *mii, int intel_adhoc_addr, + u64 *art_time) +{ + u64 ns; + + ns = mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE3); + ns <<= GMAC4_ART_TIME_SHIFT; + ns |= mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE2); + ns <<= GMAC4_ART_TIME_SHIFT; + ns |= mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE1); + ns <<= GMAC4_ART_TIME_SHIFT; + ns |= mdiobus_read(mii, intel_adhoc_addr, PMC_ART_VALUE0); + + *art_time = ns; +} + +static int intel_crosststamp(ktime_t *device, + struct system_counterval_t *system, + void *ctx) +{ + struct intel_priv_data *intel_priv; + + struct stmmac_priv *priv = (struct stmmac_priv *)ctx; + void __iomem *ptpaddr = priv->ptpaddr; + void __iomem *ioaddr = priv->hw->pcsr; + unsigned long flags; + u64 art_time = 0; + u64 ptp_time = 0; + u32 num_snapshot; + u32 gpio_value; + u32 acr_value; + int ret; + u32 v; + int i; + + if (!boot_cpu_has(X86_FEATURE_ART)) + return -EOPNOTSUPP; + + intel_priv = priv->plat->bsp_priv; + + /* Enable Internal snapshot trigger */ + acr_value = readl(ptpaddr + PTP_ACR); + acr_value &= ~PTP_ACR_MASK; + switch (priv->plat->int_snapshot_num) { + case AUX_SNAPSHOT0: + acr_value |= PTP_ACR_ATSEN0; + break; + case AUX_SNAPSHOT1: + acr_value |= PTP_ACR_ATSEN1; + break; + case AUX_SNAPSHOT2: + acr_value |= PTP_ACR_ATSEN2; + break; + case AUX_SNAPSHOT3: + acr_value |= PTP_ACR_ATSEN3; + break; + default: + return -EINVAL; + } + writel(acr_value, ptpaddr + PTP_ACR); + + /* Clear FIFO */ + acr_value = readl(ptpaddr + PTP_ACR); + acr_value |= PTP_ACR_ATSFC; + writel(acr_value, ptpaddr + PTP_ACR); + + /* Trigger Internal snapshot signal + * Create a rising edge by just toggle the GPO1 to low + * and back to high. + */ + gpio_value = readl(ioaddr + GMAC_GPIO_STATUS); + gpio_value &= ~GMAC_GPO1; + writel(gpio_value, ioaddr + GMAC_GPIO_STATUS); + gpio_value |= GMAC_GPO1; + writel(gpio_value, ioaddr + GMAC_GPIO_STATUS); + + /* Poll for time sync operation done */ + ret = readl_poll_timeout(priv->ioaddr + GMAC_INT_STATUS, v, + (v & GMAC_INT_TSIE), 100, 10000); + + if (ret == -ETIMEDOUT) { + pr_err("%s: Wait for time sync operation timeout\n", __func__); + return ret; + } + + num_snapshot = (readl(ioaddr + GMAC_TIMESTAMP_STATUS) & + GMAC_TIMESTAMP_ATSNS_MASK) >> + GMAC_TIMESTAMP_ATSNS_SHIFT; + + /* Repeat until the timestamps are from the FIFO last segment */ + for (i = 0; i < num_snapshot; i++) { + spin_lock_irqsave(&priv->ptp_lock, flags); + stmmac_get_ptptime(priv, ptpaddr, &ptp_time); + *device = ns_to_ktime(ptp_time); + spin_unlock_irqrestore(&priv->ptp_lock, flags); + get_arttime(priv->mii, intel_priv->mdio_adhoc_addr, &art_time); + *system = convert_art_to_tsc(art_time); + } + + return 0; +} + static void common_default_data(struct plat_stmmacenet_data *plat) { plat->clk_csr = 2; /* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */ @@ -384,6 +487,11 @@ static int intel_mgbe_common_data(struct pci_dev *pdev, plat->mdio_bus_data->phy_mask = 1 << INTEL_MGBE_ADHOC_ADDR; plat->mdio_bus_data->phy_mask |= 1 << INTEL_MGBE_XPCS_ADDR; + plat->int_snapshot_num = AUX_SNAPSHOT1; + + plat->has_crossts = true; + plat->crosststamp = intel_crosststamp; + return 0; } |