[net-next v2 1/3] net: ethernet: adi: adin1110: add PTP clock support
From: Alexandru Tachici
Date: Thu Jan 26 2023 - 08:34:39 EST
Add control for the PHC inside the ADIN1110/2111.
Device contains a syntonized counter driven by a 120 MHz
clock with 8 ns resolution.
Time is stored on two registers: a 32bit seconds register and
a 32bit nanoseconds register.
For adjusting the clock timing, device uses an addend register.
Can generate an output signal on the TS_TIMER pin.
For reading the timestamp the current tiem is saved by setting the
TS_CAPT pin via gpio in order to snapshot both seconds and nanoseconds
in different registers that the live ones.
Signed-off-by: Alexandru Tachici <alexandru.tachici@xxxxxxxxxx>
---
drivers/net/ethernet/adi/adin1110.c | 398 ++++++++++++++++++++++++++++
1 file changed, 398 insertions(+)
diff --git a/drivers/net/ethernet/adi/adin1110.c b/drivers/net/ethernet/adi/adin1110.c
index 0805f249fff2..1b0caec847b9 100644
--- a/drivers/net/ethernet/adi/adin1110.c
+++ b/drivers/net/ethernet/adi/adin1110.c
@@ -8,6 +8,7 @@
#include <linux/bitfield.h>
#include <linux/bits.h>
#include <linux/cache.h>
+#include <linux/clocksource.h>
#include <linux/crc8.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
@@ -15,6 +16,7 @@
#include <linux/interrupt.h>
#include <linux/iopoll.h>
#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
#include <linux/kernel.h>
#include <linux/mii.h>
#include <linux/module.h>
@@ -22,7 +24,9 @@
#include <linux/regulator/consumer.h>
#include <linux/phy.h>
#include <linux/property.h>
+#include <linux/ptp_clock_kernel.h>
#include <linux/spi/spi.h>
+#include <linux/timekeeping.h>
#include <net/switchdev.h>
@@ -35,6 +39,8 @@
#define ADIN1110_CONFIG1 0x04
#define ADIN1110_CONFIG1_SYNC BIT(15)
+#define ADIN1110_CONFIG1_FTSE BIT(7)
+#define ADIN1110_CONFIG1_FTSS BIT(6)
#define ADIN1110_CONFIG2 0x06
#define ADIN2111_P2_FWD_UNK2HOST BIT(12)
@@ -78,6 +84,20 @@
#define ADIN1110_MAC_ADDR_MASK_UPR 0x70
#define ADIN1110_MAC_ADDR_MASK_LWR 0x71
+#define ADIN1110_MAC_TS_ADDEND 0x80
+#define ADIN1110_MAC_TS_SEC_CNT 0x82
+#define ADIN1110_MAC_TS_NS_CNT 0x83
+#define ADIN1110_MAC_TS_CFG 0x84
+#define ADIN1110_MAC_TS_CFG_EN BIT(0)
+#define ADIN1110_MAC_TS_CFG_CLR BIT(1)
+#define ADIN1110_MAC_TS_CFG_TIMER_STOP BIT(3)
+#define ADIN1110_MAC_TS_CFG_CAPT_CNT BIT(4)
+#define ADIN1110_MAC_TS_TIMER_HI 0x85
+#define ADIN1110_MAC_TS_TIMER_LO 0x86
+#define ADIN1110_MAC_TS_TIMER_START 0x88
+#define ADIN1110_MAC_TS_CAPT0 0x89
+#define ADIN1110_MAC_TS_CAPT1 0x8A
+
#define ADIN1110_RX_FSIZE 0x90
#define ADIN1110_RX 0x91
@@ -90,6 +110,19 @@
#define ADIN1110_MDIO_OP_WR 0x1
#define ADIN1110_MDIO_OP_RD 0x3
+/* ADIN2111 PHY PINMUX Controls */
+#define ADIN2111_PINMUX_CFG1 0x8C56
+#define ADIN2111_PINMUX_CFG1_DIGIO_TSCAPT GENMASK(5, 4)
+
+#define ADIN2111_PINMUX_CFG1_TSCAPT_TEST_1 BIT(5)
+#define ADIN2111_PINMUX_CFG1_NOT_ASSIGNED GENMASK(5, 4)
+
+/* ADIN2111 PHY LEDs Controls */
+#define ADIN2111_LED_CNTRL 0x8C82
+#define ADIN2111_LED_CNTRL_LED0_FUNCTION GENMASK(4, 0)
+
+#define ADIN2111_LED_CNTRL_TS_TIMER 0x17
+
#define ADIN1110_CD BIT(7)
#define ADIN1110_WRITE BIT(5)
@@ -114,6 +147,11 @@
#define ADIN_MAC_P2_ADDR_SLOT 3
#define ADIN_MAC_FDB_ADDR_SLOT 4
+#define ADIN_MAC_MAX_PTP_PINS 2
+#define ADIN_MAC_MAX_TS_SLOTS 3
+
+#define adin1110_ptp_to_priv(x) container_of(x, struct adin1110_priv, ptp)
+
DECLARE_CRC8_TABLE(adin1110_crc_table);
enum adin1110_chips_id {
@@ -150,6 +188,11 @@ struct adin1110_port_priv {
struct adin1110_priv {
struct mutex lock; /* protect spi */
spinlock_t state_lock; /* protect RX mode */
+ bool ts_rx_append;
+ struct ptp_clock_info ptp;
+ struct ptp_clock *ptp_clock;
+ struct gpio_desc *ts_capt;
+ struct ptp_pin_desc ptp_pins[ADIN_MAC_MAX_PTP_PINS];
struct mii_bus *mii_bus;
struct spi_device *spidev;
bool append_crc;
@@ -1640,6 +1683,355 @@ static int adin1110_probe_netdevs(struct adin1110_priv *priv)
return 0;
}
+/* ADIN1110 has a syntonized counter driven by an internal 120 MHz clock, a 64-bit
+ * counter in which the lower 32 bits represent nanoseconds with 1 LSB = 1 ns.
+ * Frequency is adjusted by modifying the addend register.
+ */
+static int adin1110_ptp_adjfine(struct ptp_clock_info *ptp, long scaled_ppm)
+{
+ struct adin1110_priv *priv = adin1110_ptp_to_priv(ptp);
+ u32 val;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = adin1110_read_reg(priv, ADIN1110_MAC_TS_ADDEND, &val);
+ if (ret < 0)
+ goto out;
+
+ val = adjust_by_scaled_ppm(val, scaled_ppm);
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_ADDEND, val);
+out:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int adin1110_ptp_read_ts_capt(struct adin1110_priv *priv,
+ struct timespec64 *ts,
+ struct ptp_system_timestamp *sts,
+ struct ktime_timestamps *snap)
+{
+ u32 val;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ if (sts)
+ ptp_read_system_prets(sts);
+
+ if (snap) {
+ snap->mono = ktime_get_mono_fast_ns();
+ snap->real = ktime_get_real_fast_ns();
+ }
+
+ gpiod_set_value(priv->ts_capt, 1);
+ fsleep(1);
+ gpiod_set_value(priv->ts_capt, 0);
+
+ ret = adin1110_read_reg(priv, ADIN1110_MAC_TS_CAPT0, &val);
+ if (ret < 0)
+ goto out;
+ /* No TS captured when nsecs == 0 */
+ if (!val) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ts->tv_nsec = val;
+
+ ret = adin1110_read_reg(priv, ADIN1110_MAC_TS_CAPT1, &val);
+ if (ret < 0)
+ goto out;
+ if (sts)
+ ptp_read_system_postts(sts);
+
+ ts->tv_sec = val;
+out:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int adin1110_ptp_settime64(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ struct adin1110_priv *priv = adin1110_ptp_to_priv(ptp);
+ u32 addend;
+ int ret;
+
+ mutex_lock(&priv->lock);
+
+ ret = adin1110_read_reg(priv, ADIN1110_MAC_TS_ADDEND, &addend);
+ if (ret < 0)
+ goto out;
+
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_ADDEND, 0);
+ if (ret < 0)
+ goto out;
+
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_NS_CNT,
+ ALIGN(ts->tv_nsec, 16));
+ if (ret < 0)
+ goto out;
+
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_SEC_CNT,
+ ts->tv_sec);
+ if (ret < 0)
+ goto out;
+
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_ADDEND, addend);
+out:
+ mutex_unlock(&priv->lock);
+
+ return ret;
+}
+
+static int adin1110_ptp_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ struct adin1110_priv *priv = adin1110_ptp_to_priv(ptp);
+ struct timespec64 ts;
+ u64 dev_time;
+ int ret;
+
+ ret = adin1110_ptp_read_ts_capt(priv, &ts, NULL, NULL);
+ if (ret < 0)
+ return ret;
+
+ dev_time = timespec64_to_ns(&ts);
+ dev_time += delta;
+
+ ts = ns_to_timespec64(dev_time);
+
+ return adin1110_ptp_settime64(ptp, &ts);
+}
+
+static int adin1110_ptp_gettimex64(struct ptp_clock_info *ptp,
+ struct timespec64 *ts,
+ struct ptp_system_timestamp *sts)
+{
+ struct adin1110_priv *priv = adin1110_ptp_to_priv(ptp);
+
+ return adin1110_ptp_read_ts_capt(priv, ts, sts, NULL);
+}
+
+static int adin1110_ptp_getcrosststamp(struct ptp_clock_info *ptp,
+ struct system_device_crosststamp *cts)
+{
+ struct adin1110_priv *priv = adin1110_ptp_to_priv(ptp);
+ struct ktime_timestamps snap;
+ struct timespec64 ts;
+ int ret;
+
+ ret = adin1110_ptp_read_ts_capt(priv, &ts, NULL, &snap);
+ if (ret < 0)
+ return ret;
+
+ cts->device = timespec64_to_ktime(ts);
+ cts->sys_realtime = snap.real;
+ cts->sys_monoraw = snap.mono;
+
+ return 0;
+}
+
+static int adin2111_enable_ts_timer(struct adin1110_priv *priv, int on)
+{
+ struct phy_device *phydev = priv->ports[0]->phydev;
+ int ret;
+
+ mutex_lock(&phydev->lock);
+
+ ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
+ ADIN2111_LED_CNTRL,
+ ADIN2111_LED_CNTRL_LED0_FUNCTION);
+ if (ret < 0)
+ goto out;
+
+ ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
+ ADIN2111_LED_CNTRL,
+ on ? ADIN2111_LED_CNTRL_TS_TIMER : 0);
+out:
+ mutex_unlock(&phydev->lock);
+ return ret;
+}
+
+static int adin1110_enable_perout(struct adin1110_priv *priv,
+ struct ptp_perout_request perout,
+ int on)
+{
+ u32 on_nsec;
+ u32 phase;
+ u32 mask;
+ int ret;
+
+ if (priv->cfg->id == ADIN2111_MAC) {
+ ret = adin2111_enable_ts_timer(priv, on);
+ if (ret < 0)
+ return ret;
+ }
+
+ mutex_lock(&priv->lock);
+
+ ret = adin1110_set_bits(priv, ADIN1110_MAC_TS_CFG,
+ ADIN1110_MAC_TS_CFG_CLR,
+ ADIN1110_MAC_TS_CFG_CLR);
+ if (ret < 0)
+ goto out;
+
+ if (perout.flags & PTP_PEROUT_DUTY_CYCLE)
+ on_nsec = perout.on.nsec;
+ else
+ on_nsec = perout.period.nsec / 2;
+
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_TIMER_HI,
+ ALIGN(on_nsec, 16));
+ if (ret < 0)
+ goto out;
+
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_TIMER_LO,
+ ALIGN((perout.period.nsec - on_nsec), 16));
+ if (ret < 0)
+ goto out;
+
+ if (perout.flags & PTP_PEROUT_PHASE)
+ phase = ALIGN(perout.phase.nsec, 16);
+ else
+ phase = 0;
+
+ /* TS_TIMER_START reg must be written to a value >= 16 because of how
+ * the syntonized counter was implemented.
+ */
+ if (phase < 16)
+ phase = 16;
+
+ if (on) {
+ ret = adin1110_write_reg(priv, ADIN1110_MAC_TS_TIMER_START,
+ phase);
+ if (ret < 0)
+ goto out;
+ }
+
+ mask = ADIN1110_MAC_TS_CFG_EN | ADIN1110_MAC_TS_CFG_TIMER_STOP;
+ ret = adin1110_set_bits(priv, ADIN1110_MAC_TS_CFG, mask,
+ on ? ADIN1110_MAC_TS_CFG_EN : ADIN1110_MAC_TS_CFG_TIMER_STOP);
+ if (ret < 0)
+ goto out;
+
+ ret = adin1110_set_bits(priv, ADIN1110_CONFIG1, ADIN1110_CONFIG1_SYNC,
+ ADIN1110_CONFIG1_SYNC);
+out:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int adin2111_enable_extts(struct adin1110_priv *priv, int on)
+{
+ struct phy_device *phydev = priv->ports[0]->phydev;
+ u32 val;
+ int ret;
+
+ mutex_lock(&phydev->lock);
+
+ ret = phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1, ADIN2111_PINMUX_CFG1,
+ ADIN2111_PINMUX_CFG1_DIGIO_TSCAPT);
+ if (ret < 0)
+ goto out;
+
+ val = on ? ADIN2111_PINMUX_CFG1_TSCAPT_TEST_1 : ADIN2111_PINMUX_CFG1_NOT_ASSIGNED;
+ ret = phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
+ ADIN2111_PINMUX_CFG1_DIGIO_TSCAPT, val);
+out:
+ mutex_unlock(&phydev->lock);
+ return ret;
+}
+
+static int adin1110_enable_extts(struct adin1110_priv *priv,
+ struct ptp_extts_request extts,
+ int on)
+{
+ int ret;
+
+ if (extts.index >= priv->ptp.n_ext_ts)
+ return -EINVAL;
+
+ if (priv->cfg->id == ADIN2111_MAC) {
+ ret = adin2111_enable_extts(priv, on);
+ if (ret < 0)
+ return ret;
+ }
+
+ mutex_lock(&priv->lock);
+ ret = adin1110_set_bits(priv, ADIN1110_MAC_TS_CFG,
+ ADIN1110_MAC_TS_CFG_EN,
+ on ? ADIN1110_MAC_TS_CFG_EN : 0);
+ if (ret < 0)
+ goto out;
+
+ ret = adin1110_set_bits(priv, ADIN1110_CONFIG1,
+ ADIN1110_CONFIG1_SYNC,
+ ADIN1110_CONFIG1_SYNC);
+out:
+ mutex_unlock(&priv->lock);
+ return ret;
+}
+
+static int adin1110_ptp_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *request, int on)
+{
+ struct adin1110_priv *priv = adin1110_ptp_to_priv(ptp);
+
+ switch (request->type) {
+ case PTP_CLK_REQ_EXTTS:
+ return adin1110_enable_extts(priv, request->extts, on);
+ case PTP_CLK_REQ_PEROUT:
+ return adin1110_enable_perout(priv, request->perout, on);
+ case PTP_CLK_REQ_PPS:
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int adin1110_setup_ptp(struct adin1110_priv *priv)
+{
+ priv->ts_capt = devm_gpiod_get_optional(&priv->spidev->dev, "ts-capt",
+ GPIOD_OUT_LOW);
+ if (!priv->ts_capt)
+ return 0;
+
+ snprintf(priv->ptp_pins[0].name, 64, "%s-%u-ptp-per-out",
+ priv->cfg->name, priv->spidev->chip_select);
+ priv->ptp_pins[0].index = 0;
+ priv->ptp_pins[0].func = PTP_PF_PEROUT;
+ priv->ptp_pins[0].chan = 0;
+
+ snprintf(priv->ptp_pins[1].name, 64, "%s-%u-ptp-ext-ts",
+ priv->cfg->name, priv->spidev->chip_select);
+ priv->ptp_pins[1].index = 1;
+ priv->ptp_pins[1].func = PTP_PF_EXTTS;
+ priv->ptp_pins[1].chan = 0;
+
+ priv->ptp.owner = THIS_MODULE;
+ snprintf(priv->ptp.name, PTP_CLOCK_NAME_LEN, "%s-%u-ptp",
+ priv->cfg->name, priv->spidev->chip_select);
+
+ priv->ptp.max_adj = 512000;
+ priv->ptp.n_ext_ts = 1;
+ priv->ptp.n_per_out = 1;
+ priv->ptp.n_pins = ADIN_MAC_MAX_PTP_PINS;
+ priv->ptp.pin_config = priv->ptp_pins;
+ priv->ptp.adjfine = adin1110_ptp_adjfine;
+ priv->ptp.adjtime = adin1110_ptp_adjtime;
+ priv->ptp.gettimex64 = adin1110_ptp_gettimex64;
+ priv->ptp.getcrosststamp = adin1110_ptp_getcrosststamp;
+ priv->ptp.settime64 = adin1110_ptp_settime64;
+ priv->ptp.enable = adin1110_ptp_enable;
+
+ priv->ptp_clock = ptp_clock_register(&priv->ptp, &priv->spidev->dev);
+ if (IS_ERR(priv->ptp_clock))
+ return PTR_ERR(priv->ptp_clock);
+
+ return 0;
+}
+
static int adin1110_probe(struct spi_device *spi)
{
const struct spi_device_id *dev_id = spi_get_device_id(spi);
@@ -1680,6 +2072,12 @@ static int adin1110_probe(struct spi_device *spi)
return ret;
}
+ ret = adin1110_setup_ptp(priv);
+ if (ret < 0) {
+ dev_err(dev, "Could not register PTP clock %d\n", ret);
+ return ret;
+ }
+
return adin1110_probe_netdevs(priv);
}
--
2.34.1