diff options
Diffstat (limited to 'drivers/net/phy/nxp-c45-tja11xx.c')
| -rw-r--r-- | drivers/net/phy/nxp-c45-tja11xx.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/drivers/net/phy/nxp-c45-tja11xx.c b/drivers/net/phy/nxp-c45-tja11xx.c index 91a327f67a42..06fdbae509a7 100644 --- a/drivers/net/phy/nxp-c45-tja11xx.c +++ b/drivers/net/phy/nxp-c45-tja11xx.c @@ -97,6 +97,11 @@ #define VEND1_TX_IPG_LENGTH 0xAFD1 #define COUNTER_EN BIT(15) +#define VEND1_PTP_CONFIG 0x1102 +#define EXT_TRG_EDGE BIT(1) +#define PPS_OUT_POL BIT(2) +#define PPS_OUT_EN BIT(3) + #define VEND1_LTC_LOAD_CTRL 0x1105 #define READ_LTC BIT(2) #define LOAD_LTC BIT(0) @@ -132,6 +137,13 @@ #define VEND1_EGR_RING_DATA_3 0x1151 #define VEND1_EGR_RING_CTRL 0x1154 +#define VEND1_EXT_TRG_TS_DATA_0 0x1121 +#define VEND1_EXT_TRG_TS_DATA_1 0x1122 +#define VEND1_EXT_TRG_TS_DATA_2 0x1123 +#define VEND1_EXT_TRG_TS_DATA_3 0x1124 +#define VEND1_EXT_TRG_TS_DATA_4 0x1125 +#define VEND1_EXT_TRG_TS_CTRL 0x1126 + #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) @@ -162,6 +174,17 @@ #define VEND1_RX_PIPE_DLY_NS 0x114B #define VEND1_RX_PIPEDLY_SUBNS 0x114C +#define VEND1_GPIO_FUNC_CONFIG_BASE 0x2C40 +#define GPIO_FUNC_EN BIT(15) +#define GPIO_FUNC_PTP BIT(6) +#define GPIO_SIGNAL_PTP_TRIGGER 0x01 +#define GPIO_SIGNAL_PPS_OUT 0x12 +#define GPIO_DISABLE 0 +#define GPIO_PPS_OUT_CFG (GPIO_FUNC_EN | GPIO_FUNC_PTP | \ + GPIO_SIGNAL_PPS_OUT) +#define GPIO_EXTTS_OUT_CFG (GPIO_FUNC_EN | GPIO_FUNC_PTP | \ + GPIO_SIGNAL_PTP_TRIGGER) + #define RGMII_PERIOD_PS 8000U #define PS_PER_DEGREE div_u64(RGMII_PERIOD_PS, 360) #define MIN_ID_PS 1644U @@ -199,6 +222,9 @@ struct nxp_c45_phy { int hwts_rx; u32 tx_delay; u32 rx_delay; + struct timespec64 extts_ts; + int extts_index; + bool extts; }; struct nxp_c45_phy_stats { @@ -339,6 +365,21 @@ static bool nxp_c45_match_ts(struct ptp_header *header, header->domain_number == hwts->domain_number; } +static void nxp_c45_get_extts(struct nxp_c45_phy *priv, + struct timespec64 *extts) +{ + extts->tv_nsec = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1, + VEND1_EXT_TRG_TS_DATA_0); + extts->tv_nsec |= phy_read_mmd(priv->phydev, MDIO_MMD_VEND1, + VEND1_EXT_TRG_TS_DATA_1) << 16; + extts->tv_sec = phy_read_mmd(priv->phydev, MDIO_MMD_VEND1, + VEND1_EXT_TRG_TS_DATA_2); + extts->tv_sec |= phy_read_mmd(priv->phydev, MDIO_MMD_VEND1, + VEND1_EXT_TRG_TS_DATA_3) << 16; + phy_write_mmd(priv->phydev, MDIO_MMD_VEND1, VEND1_EXT_TRG_TS_CTRL, + RING_DONE); +} + static bool nxp_c45_get_hwtxts(struct nxp_c45_phy *priv, struct nxp_c45_hwts *hwts) { @@ -409,6 +450,7 @@ 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 ptp_clock_event event; struct nxp_c45_hwts hwts; bool reschedule = false; struct timespec64 ts; @@ -439,9 +481,181 @@ static long nxp_c45_do_aux_work(struct ptp_clock_info *ptp) netif_rx_ni(skb); } + if (priv->extts) { + nxp_c45_get_extts(priv, &ts); + if (timespec64_compare(&ts, &priv->extts_ts) != 0) { + priv->extts_ts = ts; + event.index = priv->extts_index; + event.type = PTP_CLOCK_EXTTS; + event.timestamp = ns_to_ktime(timespec64_to_ns(&ts)); + ptp_clock_event(priv->ptp_clock, &event); + } + reschedule = true; + } + return reschedule ? 1 : -1; } +static void nxp_c45_gpio_config(struct nxp_c45_phy *priv, + int pin, u16 pin_cfg) +{ + struct phy_device *phydev = priv->phydev; + + phy_write_mmd(phydev, MDIO_MMD_VEND1, + VEND1_GPIO_FUNC_CONFIG_BASE + pin, pin_cfg); +} + +static int nxp_c45_perout_enable(struct nxp_c45_phy *priv, + struct ptp_perout_request *perout, int on) +{ + struct phy_device *phydev = priv->phydev; + int pin; + + if (perout->flags & ~PTP_PEROUT_PHASE) + return -EOPNOTSUPP; + + pin = ptp_find_pin(priv->ptp_clock, PTP_PF_PEROUT, perout->index); + if (pin < 0) + return pin; + + if (!on) { + phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, VEND1_PTP_CONFIG, + PPS_OUT_EN); + phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, VEND1_PTP_CONFIG, + PPS_OUT_POL); + + nxp_c45_gpio_config(priv, pin, GPIO_DISABLE); + + return 0; + } + + /* The PPS signal is fixed to 1 second and is always generated when the + * seconds counter is incremented. The start time is not configurable. + * If the clock is adjusted, the PPS signal is automatically readjusted. + */ + if (perout->period.sec != 1 || perout->period.nsec != 0) { + phydev_warn(phydev, "The period can be set only to 1 second."); + return -EINVAL; + } + + if (!(perout->flags & PTP_PEROUT_PHASE)) { + if (perout->start.sec != 0 || perout->start.nsec != 0) { + phydev_warn(phydev, "The start time is not configurable. Should be set to 0 seconds and 0 nanoseconds."); + return -EINVAL; + } + } else { + if (perout->phase.nsec != 0 && + perout->phase.nsec != (NSEC_PER_SEC >> 1)) { + phydev_warn(phydev, "The phase can be set only to 0 or 500000000 nanoseconds."); + return -EINVAL; + } + + if (perout->phase.nsec == 0) + phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, + VEND1_PTP_CONFIG, PPS_OUT_POL); + else + phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, + VEND1_PTP_CONFIG, PPS_OUT_POL); + } + + nxp_c45_gpio_config(priv, pin, GPIO_PPS_OUT_CFG); + + phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, VEND1_PTP_CONFIG, PPS_OUT_EN); + + return 0; +} + +static int nxp_c45_extts_enable(struct nxp_c45_phy *priv, + struct ptp_extts_request *extts, int on) +{ + int pin; + + if (extts->flags & ~(PTP_ENABLE_FEATURE | + PTP_RISING_EDGE | + PTP_FALLING_EDGE | + PTP_STRICT_FLAGS)) + return -EOPNOTSUPP; + + /* Sampling on both edges is not supported */ + if ((extts->flags & PTP_RISING_EDGE) && + (extts->flags & PTP_FALLING_EDGE)) + return -EOPNOTSUPP; + + pin = ptp_find_pin(priv->ptp_clock, PTP_PF_EXTTS, extts->index); + if (pin < 0) + return pin; + + if (!on) { + nxp_c45_gpio_config(priv, pin, GPIO_DISABLE); + priv->extts = false; + + return 0; + } + + if (extts->flags & PTP_RISING_EDGE) + phy_clear_bits_mmd(priv->phydev, MDIO_MMD_VEND1, + VEND1_PTP_CONFIG, EXT_TRG_EDGE); + + if (extts->flags & PTP_FALLING_EDGE) + phy_set_bits_mmd(priv->phydev, MDIO_MMD_VEND1, + VEND1_PTP_CONFIG, EXT_TRG_EDGE); + + nxp_c45_gpio_config(priv, pin, GPIO_EXTTS_OUT_CFG); + priv->extts = true; + priv->extts_index = extts->index; + ptp_schedule_worker(priv->ptp_clock, 0); + + return 0; +} + +static int nxp_c45_ptp_enable(struct ptp_clock_info *ptp, + struct ptp_clock_request *req, int on) +{ + struct nxp_c45_phy *priv = container_of(ptp, struct nxp_c45_phy, caps); + + switch (req->type) { + case PTP_CLK_REQ_EXTTS: + return nxp_c45_extts_enable(priv, &req->extts, on); + case PTP_CLK_REQ_PEROUT: + return nxp_c45_perout_enable(priv, &req->perout, on); + default: + return -EOPNOTSUPP; + } +} + +static struct ptp_pin_desc nxp_c45_ptp_pins[] = { + { "nxp_c45_gpio0", 0, PTP_PF_NONE}, + { "nxp_c45_gpio1", 1, PTP_PF_NONE}, + { "nxp_c45_gpio2", 2, PTP_PF_NONE}, + { "nxp_c45_gpio3", 3, PTP_PF_NONE}, + { "nxp_c45_gpio4", 4, PTP_PF_NONE}, + { "nxp_c45_gpio5", 5, PTP_PF_NONE}, + { "nxp_c45_gpio6", 6, PTP_PF_NONE}, + { "nxp_c45_gpio7", 7, PTP_PF_NONE}, + { "nxp_c45_gpio8", 8, PTP_PF_NONE}, + { "nxp_c45_gpio9", 9, PTP_PF_NONE}, + { "nxp_c45_gpio10", 10, PTP_PF_NONE}, + { "nxp_c45_gpio11", 11, PTP_PF_NONE}, +}; + +static int nxp_c45_ptp_verify_pin(struct ptp_clock_info *ptp, unsigned int pin, + enum ptp_pin_function func, unsigned int chan) +{ + if (pin >= ARRAY_SIZE(nxp_c45_ptp_pins)) + return -EINVAL; + + switch (func) { + case PTP_PF_NONE: + case PTP_PF_PEROUT: + case PTP_PF_EXTTS: + break; + default: + return -EOPNOTSUPP; + } + + return 0; +} + static int nxp_c45_init_ptp_clock(struct nxp_c45_phy *priv) { priv->caps = (struct ptp_clock_info) { @@ -452,7 +666,13 @@ static int nxp_c45_init_ptp_clock(struct nxp_c45_phy *priv) .adjtime = nxp_c45_ptp_adjtime, .gettimex64 = nxp_c45_ptp_gettimex64, .settime64 = nxp_c45_ptp_settime64, + .enable = nxp_c45_ptp_enable, + .verify = nxp_c45_ptp_verify_pin, .do_aux_work = nxp_c45_do_aux_work, + .pin_config = nxp_c45_ptp_pins, + .n_pins = ARRAY_SIZE(nxp_c45_ptp_pins), + .n_ext_ts = 1, + .n_per_out = 1, }; priv->ptp_clock = ptp_clock_register(&priv->caps, |