diff options
Diffstat (limited to 'drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c')
| -rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c | 75 |
1 files changed, 74 insertions, 1 deletions
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c index 0989e2bb6ee3..4e86cdf2bc9f 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.c @@ -9,6 +9,7 @@ *******************************************************************************/ #include "stmmac.h" #include "stmmac_ptp.h" +#include "dwmac4.h" /** * stmmac_adjust_freq @@ -134,7 +135,10 @@ static int stmmac_enable(struct ptp_clock_info *ptp, { struct stmmac_priv *priv = container_of(ptp, struct stmmac_priv, ptp_clock_ops); + void __iomem *ptpaddr = priv->ptpaddr; + void __iomem *ioaddr = priv->hw->pcsr; struct stmmac_pps_cfg *cfg; + u32 intr_value, acr_value; int ret = -EOPNOTSUPP; unsigned long flags; @@ -158,6 +162,37 @@ static int stmmac_enable(struct ptp_clock_info *ptp, priv->systime_flags); spin_unlock_irqrestore(&priv->ptp_lock, flags); break; + case PTP_CLK_REQ_EXTTS: + priv->plat->ext_snapshot_en = on; + mutex_lock(&priv->aux_ts_lock); + acr_value = readl(ptpaddr + PTP_ACR); + acr_value &= ~PTP_ACR_MASK; + if (on) { + /* Enable External snapshot trigger */ + acr_value |= priv->plat->ext_snapshot_num; + acr_value |= PTP_ACR_ATSFC; + netdev_dbg(priv->dev, "Auxiliary Snapshot %d enabled.\n", + priv->plat->ext_snapshot_num >> + PTP_ACR_ATSEN_SHIFT); + /* Enable Timestamp Interrupt */ + intr_value = readl(ioaddr + GMAC_INT_EN); + intr_value |= GMAC_INT_TSIE; + writel(intr_value, ioaddr + GMAC_INT_EN); + + } else { + netdev_dbg(priv->dev, "Auxiliary Snapshot %d disabled.\n", + priv->plat->ext_snapshot_num >> + PTP_ACR_ATSEN_SHIFT); + /* Disable Timestamp Interrupt */ + intr_value = readl(ioaddr + GMAC_INT_EN); + intr_value &= ~GMAC_INT_TSIE; + writel(intr_value, ioaddr + GMAC_INT_EN); + } + writel(acr_value, ptpaddr + PTP_ACR); + mutex_unlock(&priv->aux_ts_lock); + ret = 0; + break; + default: break; } @@ -165,13 +200,43 @@ static int stmmac_enable(struct ptp_clock_info *ptp, return ret; } +/** + * stmmac_get_syncdevicetime + * @device: current device time + * @system: system counter value read synchronously with device time + * @ctx: context provided by timekeeping code + * Description: Read device and system clock simultaneously and return the + * corrected clock values in ns. + **/ +static int stmmac_get_syncdevicetime(ktime_t *device, + struct system_counterval_t *system, + void *ctx) +{ + struct stmmac_priv *priv = (struct stmmac_priv *)ctx; + + if (priv->plat->crosststamp) + return priv->plat->crosststamp(device, system, ctx); + else + return -EOPNOTSUPP; +} + +static int stmmac_getcrosststamp(struct ptp_clock_info *ptp, + struct system_device_crosststamp *xtstamp) +{ + struct stmmac_priv *priv = + container_of(ptp, struct stmmac_priv, ptp_clock_ops); + + return get_device_system_crosststamp(stmmac_get_syncdevicetime, + priv, NULL, xtstamp); +} + /* structure describing a PTP hardware clock */ static struct ptp_clock_info stmmac_ptp_clock_ops = { .owner = THIS_MODULE, .name = "stmmac ptp", .max_adj = 62500000, .n_alarm = 0, - .n_ext_ts = 0, + .n_ext_ts = 0, /* will be overwritten in stmmac_ptp_register */ .n_per_out = 0, /* will be overwritten in stmmac_ptp_register */ .n_pins = 0, .pps = 0, @@ -180,6 +245,7 @@ static struct ptp_clock_info stmmac_ptp_clock_ops = { .gettime64 = stmmac_get_time, .settime64 = stmmac_set_time, .enable = stmmac_enable, + .getcrosststamp = stmmac_getcrosststamp, }; /** @@ -192,6 +258,9 @@ void stmmac_ptp_register(struct stmmac_priv *priv) { int i; + if (priv->plat->ptp_clk_freq_config) + priv->plat->ptp_clk_freq_config(priv); + for (i = 0; i < priv->dma_cap.pps_out_num; i++) { if (i >= STMMAC_PPS_MAX) break; @@ -202,8 +271,10 @@ void stmmac_ptp_register(struct stmmac_priv *priv) stmmac_ptp_clock_ops.max_adj = priv->plat->ptp_max_adj; stmmac_ptp_clock_ops.n_per_out = priv->dma_cap.pps_out_num; + stmmac_ptp_clock_ops.n_ext_ts = priv->dma_cap.aux_snapshot_n; spin_lock_init(&priv->ptp_lock); + mutex_init(&priv->aux_ts_lock); priv->ptp_clock_ops = stmmac_ptp_clock_ops; priv->ptp_clock = ptp_clock_register(&priv->ptp_clock_ops, @@ -229,4 +300,6 @@ void stmmac_ptp_unregister(struct stmmac_priv *priv) pr_debug("Removed PTP HW clock successfully on %s\n", priv->dev->name); } + + mutex_destroy(&priv->aux_ts_lock); } |