diff options
| -rw-r--r-- | drivers/net/phy/micrel.c | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index e26c6723caa4..cb87d38b4d9a 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -3437,6 +3437,7 @@ static void lan8841_ptp_process_rx_ts(struct kszphy_ptp_priv *ptp_priv) #define LAN8841_PTP_INT_STS_PTP_TX_TS_INT BIT(12) #define LAN8841_PTP_INT_STS_PTP_RX_TS_OVRFL_INT BIT(9) #define LAN8841_PTP_INT_STS_PTP_RX_TS_INT BIT(8) +#define LAN8841_PTP_INT_STS_PTP_GPIO_CAP_INT BIT(2) static void lan8841_ptp_flush_fifo(struct kszphy_ptp_priv *ptp_priv, bool egress) { @@ -3451,6 +3452,67 @@ static void lan8841_ptp_flush_fifo(struct kszphy_ptp_priv *ptp_priv, bool egress phy_read_mmd(phydev, 2, LAN8841_PTP_INT_STS); } +#define LAN8841_PTP_GPIO_CAP_STS 506 +#define LAN8841_PTP_GPIO_SEL 327 +#define LAN8841_PTP_GPIO_SEL_GPIO_SEL(gpio) ((gpio) << 8) +#define LAN8841_PTP_GPIO_RE_LTC_SEC_HI_CAP 498 +#define LAN8841_PTP_GPIO_RE_LTC_SEC_LO_CAP 499 +#define LAN8841_PTP_GPIO_RE_LTC_NS_HI_CAP 500 +#define LAN8841_PTP_GPIO_RE_LTC_NS_LO_CAP 501 +#define LAN8841_PTP_GPIO_FE_LTC_SEC_HI_CAP 502 +#define LAN8841_PTP_GPIO_FE_LTC_SEC_LO_CAP 503 +#define LAN8841_PTP_GPIO_FE_LTC_NS_HI_CAP 504 +#define LAN8841_PTP_GPIO_FE_LTC_NS_LO_CAP 505 + +static void lan8841_gpio_process_cap(struct kszphy_ptp_priv *ptp_priv) +{ + struct phy_device *phydev = ptp_priv->phydev; + struct ptp_clock_event ptp_event = {0}; + int pin, ret, tmp; + s32 sec, nsec; + + pin = ptp_find_pin_unlocked(ptp_priv->ptp_clock, PTP_PF_EXTTS, 0); + if (pin == -1) + return; + + tmp = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_CAP_STS); + if (tmp < 0) + return; + + ret = phy_write_mmd(phydev, 2, LAN8841_PTP_GPIO_SEL, + LAN8841_PTP_GPIO_SEL_GPIO_SEL(pin)); + if (ret) + return; + + mutex_lock(&ptp_priv->ptp_lock); + if (tmp & BIT(pin)) { + sec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_SEC_HI_CAP); + sec <<= 16; + sec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_SEC_LO_CAP); + + nsec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_NS_HI_CAP) & 0x3fff; + nsec <<= 16; + nsec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_RE_LTC_NS_LO_CAP); + } else { + sec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_SEC_HI_CAP); + sec <<= 16; + sec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_SEC_LO_CAP); + + nsec = phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_NS_HI_CAP) & 0x3fff; + nsec <<= 16; + nsec |= phy_read_mmd(phydev, 2, LAN8841_PTP_GPIO_FE_LTC_NS_LO_CAP); + } + mutex_unlock(&ptp_priv->ptp_lock); + ret = phy_write_mmd(phydev, 2, LAN8841_PTP_GPIO_SEL, 0); + if (ret) + return; + + ptp_event.index = 0; + ptp_event.timestamp = ktime_set(sec, nsec); + ptp_event.type = PTP_CLOCK_EXTTS; + ptp_clock_event(ptp_priv->ptp_clock, &ptp_event); +} + static void lan8841_handle_ptp_interrupt(struct phy_device *phydev) { struct kszphy_priv *priv = phydev->priv; @@ -3459,12 +3521,16 @@ static void lan8841_handle_ptp_interrupt(struct phy_device *phydev) do { status = phy_read_mmd(phydev, 2, LAN8841_PTP_INT_STS); + if (status & LAN8841_PTP_INT_STS_PTP_TX_TS_INT) lan8841_ptp_process_tx_ts(ptp_priv); if (status & LAN8841_PTP_INT_STS_PTP_RX_TS_INT) lan8841_ptp_process_rx_ts(ptp_priv); + if (status & LAN8841_PTP_INT_STS_PTP_GPIO_CAP_INT) + lan8841_gpio_process_cap(ptp_priv); + if (status & LAN8841_PTP_INT_STS_PTP_TX_TS_OVRFL_INT) { lan8841_ptp_flush_fifo(ptp_priv, true); skb_queue_purge(&ptp_priv->tx_queue); @@ -3924,6 +3990,7 @@ static int lan8841_ptp_verify(struct ptp_clock_info *ptp, unsigned int pin, switch (func) { case PTP_PF_NONE: case PTP_PF_PEROUT: + case PTP_PF_EXTTS: break; default: return -1; @@ -4191,10 +4258,104 @@ static int lan8841_ptp_perout(struct ptp_clock_info *ptp, return ret; } +#define LAN8841_PTP_GPIO_CAP_EN 496 +#define LAN8841_PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(gpio) (BIT(gpio)) +#define LAN8841_PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(gpio) (BIT(gpio) << 8) +#define LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN BIT(2) + +static int lan8841_ptp_extts_on(struct kszphy_ptp_priv *ptp_priv, int pin, + u32 flags) +{ + struct phy_device *phydev = ptp_priv->phydev; + u16 tmp = 0; + int ret; + + /* Set GPIO to be intput */ + ret = phy_set_bits_mmd(phydev, 2, LAN8841_GPIO_EN, BIT(pin)); + if (ret) + return ret; + + ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_BUF, BIT(pin)); + if (ret) + return ret; + + /* Enable capture on the edges of the pin */ + if (flags & PTP_RISING_EDGE) + tmp |= LAN8841_PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(pin); + if (flags & PTP_FALLING_EDGE) + tmp |= LAN8841_PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(pin); + ret = phy_write_mmd(phydev, 2, LAN8841_PTP_GPIO_CAP_EN, tmp); + if (ret) + return ret; + + /* Enable interrupt */ + return phy_modify_mmd(phydev, 2, LAN8841_PTP_INT_EN, + LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN, + LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN); +} + +static int lan8841_ptp_extts_off(struct kszphy_ptp_priv *ptp_priv, int pin) +{ + struct phy_device *phydev = ptp_priv->phydev; + int ret; + + /* Set GPIO to be output */ + ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_EN, BIT(pin)); + if (ret) + return ret; + + ret = phy_clear_bits_mmd(phydev, 2, LAN8841_GPIO_BUF, BIT(pin)); + if (ret) + return ret; + + /* Disable capture on both of the edges */ + ret = phy_modify_mmd(phydev, 2, LAN8841_PTP_GPIO_CAP_EN, + LAN8841_PTP_GPIO_CAP_EN_GPIO_RE_CAPTURE_ENABLE(pin) | + LAN8841_PTP_GPIO_CAP_EN_GPIO_FE_CAPTURE_ENABLE(pin), + 0); + if (ret) + return ret; + + /* Disable interrupt */ + return phy_modify_mmd(phydev, 2, LAN8841_PTP_INT_EN, + LAN8841_PTP_INT_EN_PTP_GPIO_CAP_EN, + 0); +} + +static int lan8841_ptp_extts(struct ptp_clock_info *ptp, + struct ptp_clock_request *rq, int on) +{ + struct kszphy_ptp_priv *ptp_priv = container_of(ptp, struct kszphy_ptp_priv, + ptp_clock_info); + int pin; + int ret; + + /* Reject requests with unsupported flags */ + if (rq->extts.flags & ~(PTP_ENABLE_FEATURE | + PTP_EXTTS_EDGES | + PTP_STRICT_FLAGS)) + return -EOPNOTSUPP; + + pin = ptp_find_pin(ptp_priv->ptp_clock, PTP_PF_EXTTS, rq->extts.index); + if (pin == -1 || pin >= LAN8841_PTP_GPIO_NUM) + return -EINVAL; + + mutex_lock(&ptp_priv->ptp_lock); + if (on) + ret = lan8841_ptp_extts_on(ptp_priv, pin, rq->extts.flags); + else + ret = lan8841_ptp_extts_off(ptp_priv, pin); + mutex_unlock(&ptp_priv->ptp_lock); + + return ret; +} + static int lan8841_ptp_enable(struct ptp_clock_info *ptp, struct ptp_clock_request *rq, int on) { switch (rq->type) { + case PTP_CLK_REQ_EXTTS: + return lan8841_ptp_extts(ptp, rq, on); case PTP_CLK_REQ_PEROUT: return lan8841_ptp_perout(ptp, rq, on); default: @@ -4215,6 +4376,7 @@ static struct ptp_clock_info lan8841_ptp_clock_info = { .verify = lan8841_ptp_verify, .enable = lan8841_ptp_enable, .n_per_out = LAN8841_PTP_GPIO_NUM, + .n_ext_ts = LAN8841_PTP_GPIO_NUM, .n_pins = LAN8841_PTP_GPIO_NUM, }; 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