ice: add callbacks for Embedded SYNC enablement on dpll pins

Allow the user to get and set configuration of Embedded SYNC feature
on the ice driver dpll pins.

Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20240822222513.255179-3-arkadiusz.kubalewski@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/intel/ice/ice_dpll.c

@@ -9,6 +9,7 @@
 #define ICE_CGU_STATE_ACQ_ERR_THRESHOLD		50
 #define ICE_DPLL_PIN_IDX_INVALID		0xff
 #define ICE_DPLL_RCLK_NUM_PER_PF		1
+#define ICE_DPLL_PIN_ESYNC_PULSE_HIGH_PERCENT	25
 
 /**
  * enum ice_dpll_pin_type - enumerate ice pin types:
@@ -30,6 +31,10 @@ static const char * const pin_type_name[] = {
 	[ICE_DPLL_PIN_TYPE_RCLK_INPUT] = "rclk-input",
 };
 
+static const struct dpll_pin_frequency ice_esync_range[] = {
+	DPLL_PIN_FREQUENCY_RANGE(0, DPLL_PIN_FREQUENCY_1_HZ),
+};
+
 /**
  * ice_dpll_is_reset - check if reset is in progress
  * @pf: private board structure
@@ -394,8 +399,8 @@ ice_dpll_pin_state_update(struct ice_pf *pf, struct ice_dpll_pin *pin,
 
 	switch (pin_type) {
 	case ICE_DPLL_PIN_TYPE_INPUT:
-		ret = ice_aq_get_input_pin_cfg(&pf->hw, pin->idx, NULL, NULL,
+		ret = ice_aq_get_input_pin_cfg(&pf->hw, pin->idx, &pin->status,
-					       NULL, &pin->flags[0],
+					       NULL, NULL, &pin->flags[0],
 					       &pin->freq, &pin->phase_adjust);
 		if (ret)
 			goto err;
@@ -430,7 +435,7 @@ ice_dpll_pin_state_update(struct ice_pf *pf, struct ice_dpll_pin *pin,
 			goto err;
 
 		parent &= ICE_AQC_GET_CGU_OUT_CFG_DPLL_SRC_SEL;
-		if (ICE_AQC_SET_CGU_OUT_CFG_OUT_EN & pin->flags[0]) {
+		if (ICE_AQC_GET_CGU_OUT_CFG_OUT_EN & pin->flags[0]) {
 			pin->state[pf->dplls.eec.dpll_idx] =
 				parent == pf->dplls.eec.dpll_idx ?
 				DPLL_PIN_STATE_CONNECTED :
@@ -1098,6 +1103,214 @@ ice_dpll_phase_offset_get(const struct dpll_pin *pin, void *pin_priv,
 	return 0;
 }
 
+/**
+ * ice_dpll_output_esync_set - callback for setting embedded sync
+ * @pin: pointer to a pin
+ * @pin_priv: private data pointer passed on pin registration
+ * @dpll: registered dpll pointer
+ * @dpll_priv: private data pointer passed on dpll registration
+ * @freq: requested embedded sync frequency
+ * @extack: error reporting
+ *
+ * Dpll subsystem callback. Handler for setting embedded sync frequency value
+ * on output pin.
+ *
+ * Context: Acquires pf->dplls.lock
+ * Return:
+ * * 0 - success
+ * * negative - error
+ */
+static int
+ice_dpll_output_esync_set(const struct dpll_pin *pin, void *pin_priv,
+			  const struct dpll_device *dpll, void *dpll_priv,
+			  u64 freq, struct netlink_ext_ack *extack)
+{
+	struct ice_dpll_pin *p = pin_priv;
+	struct ice_dpll *d = dpll_priv;
+	struct ice_pf *pf = d->pf;
+	u8 flags = 0;
+	int ret;
+
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+	mutex_lock(&pf->dplls.lock);
+	if (p->flags[0] & ICE_AQC_GET_CGU_OUT_CFG_OUT_EN)
+		flags = ICE_AQC_SET_CGU_OUT_CFG_OUT_EN;
+	if (freq == DPLL_PIN_FREQUENCY_1_HZ) {
+		if (p->flags[0] & ICE_AQC_GET_CGU_OUT_CFG_ESYNC_EN) {
+			ret = 0;
+		} else {
+			flags |= ICE_AQC_SET_CGU_OUT_CFG_ESYNC_EN;
+			ret = ice_aq_set_output_pin_cfg(&pf->hw, p->idx, flags,
+							0, 0, 0);
+		}
+	} else {
+		if (!(p->flags[0] & ICE_AQC_GET_CGU_OUT_CFG_ESYNC_EN)) {
+			ret = 0;
+		} else {
+			flags &= ~ICE_AQC_SET_CGU_OUT_CFG_ESYNC_EN;
+			ret = ice_aq_set_output_pin_cfg(&pf->hw, p->idx, flags,
+							0, 0, 0);
+		}
+	}
+	mutex_unlock(&pf->dplls.lock);
+
+	return ret;
+}
+
+/**
+ * ice_dpll_output_esync_get - callback for getting embedded sync config
+ * @pin: pointer to a pin
+ * @pin_priv: private data pointer passed on pin registration
+ * @dpll: registered dpll pointer
+ * @dpll_priv: private data pointer passed on dpll registration
+ * @esync: on success holds embedded sync pin properties
+ * @extack: error reporting
+ *
+ * Dpll subsystem callback. Handler for getting embedded sync frequency value
+ * and capabilities on output pin.
+ *
+ * Context: Acquires pf->dplls.lock
+ * Return:
+ * * 0 - success
+ * * negative - error
+ */
+static int
+ice_dpll_output_esync_get(const struct dpll_pin *pin, void *pin_priv,
+			  const struct dpll_device *dpll, void *dpll_priv,
+			  struct dpll_pin_esync *esync,
+			  struct netlink_ext_ack *extack)
+{
+	struct ice_dpll_pin *p = pin_priv;
+	struct ice_dpll *d = dpll_priv;
+	struct ice_pf *pf = d->pf;
+
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+	mutex_lock(&pf->dplls.lock);
+	if (!(p->flags[0] & ICE_AQC_GET_CGU_OUT_CFG_ESYNC_ABILITY) ||
+	    p->freq != DPLL_PIN_FREQUENCY_10_MHZ) {
+		mutex_unlock(&pf->dplls.lock);
+		return -EOPNOTSUPP;
+	}
+	esync->range = ice_esync_range;
+	esync->range_num = ARRAY_SIZE(ice_esync_range);
+	if (p->flags[0] & ICE_AQC_GET_CGU_OUT_CFG_ESYNC_EN) {
+		esync->freq = DPLL_PIN_FREQUENCY_1_HZ;
+		esync->pulse = ICE_DPLL_PIN_ESYNC_PULSE_HIGH_PERCENT;
+	} else {
+		esync->freq = 0;
+		esync->pulse = 0;
+	}
+	mutex_unlock(&pf->dplls.lock);
+
+	return 0;
+}
+
+/**
+ * ice_dpll_input_esync_set - callback for setting embedded sync
+ * @pin: pointer to a pin
+ * @pin_priv: private data pointer passed on pin registration
+ * @dpll: registered dpll pointer
+ * @dpll_priv: private data pointer passed on dpll registration
+ * @freq: requested embedded sync frequency
+ * @extack: error reporting
+ *
+ * Dpll subsystem callback. Handler for setting embedded sync frequency value
+ * on input pin.
+ *
+ * Context: Acquires pf->dplls.lock
+ * Return:
+ * * 0 - success
+ * * negative - error
+ */
+static int
+ice_dpll_input_esync_set(const struct dpll_pin *pin, void *pin_priv,
+			 const struct dpll_device *dpll, void *dpll_priv,
+			 u64 freq, struct netlink_ext_ack *extack)
+{
+	struct ice_dpll_pin *p = pin_priv;
+	struct ice_dpll *d = dpll_priv;
+	struct ice_pf *pf = d->pf;
+	u8 flags_en = 0;
+	int ret;
+
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+	mutex_lock(&pf->dplls.lock);
+	if (p->flags[0] & ICE_AQC_GET_CGU_IN_CFG_FLG2_INPUT_EN)
+		flags_en = ICE_AQC_SET_CGU_IN_CFG_FLG2_INPUT_EN;
+	if (freq == DPLL_PIN_FREQUENCY_1_HZ) {
+		if (p->flags[0] & ICE_AQC_GET_CGU_IN_CFG_FLG2_ESYNC_EN) {
+			ret = 0;
+		} else {
+			flags_en |= ICE_AQC_SET_CGU_IN_CFG_FLG2_ESYNC_EN;
+			ret = ice_aq_set_input_pin_cfg(&pf->hw, p->idx, 0,
+						       flags_en, 0, 0);
+		}
+	} else {
+		if (!(p->flags[0] & ICE_AQC_GET_CGU_IN_CFG_FLG2_ESYNC_EN)) {
+			ret = 0;
+		} else {
+			flags_en &= ~ICE_AQC_SET_CGU_IN_CFG_FLG2_ESYNC_EN;
+			ret = ice_aq_set_input_pin_cfg(&pf->hw, p->idx, 0,
+						       flags_en, 0, 0);
+		}
+	}
+	mutex_unlock(&pf->dplls.lock);
+
+	return ret;
+}
+
+/**
+ * ice_dpll_input_esync_get - callback for getting embedded sync config
+ * @pin: pointer to a pin
+ * @pin_priv: private data pointer passed on pin registration
+ * @dpll: registered dpll pointer
+ * @dpll_priv: private data pointer passed on dpll registration
+ * @esync: on success holds embedded sync pin properties
+ * @extack: error reporting
+ *
+ * Dpll subsystem callback. Handler for getting embedded sync frequency value
+ * and capabilities on input pin.
+ *
+ * Context: Acquires pf->dplls.lock
+ * Return:
+ * * 0 - success
+ * * negative - error
+ */
+static int
+ice_dpll_input_esync_get(const struct dpll_pin *pin, void *pin_priv,
+			 const struct dpll_device *dpll, void *dpll_priv,
+			 struct dpll_pin_esync *esync,
+			 struct netlink_ext_ack *extack)
+{
+	struct ice_dpll_pin *p = pin_priv;
+	struct ice_dpll *d = dpll_priv;
+	struct ice_pf *pf = d->pf;
+
+	if (ice_dpll_is_reset(pf, extack))
+		return -EBUSY;
+	mutex_lock(&pf->dplls.lock);
+	if (!(p->status & ICE_AQC_GET_CGU_IN_CFG_STATUS_ESYNC_CAP) ||
+	    p->freq != DPLL_PIN_FREQUENCY_10_MHZ) {
+		mutex_unlock(&pf->dplls.lock);
+		return -EOPNOTSUPP;
+	}
+	esync->range = ice_esync_range;
+	esync->range_num = ARRAY_SIZE(ice_esync_range);
+	if (p->flags[0] & ICE_AQC_GET_CGU_IN_CFG_FLG2_ESYNC_EN) {
+		esync->freq = DPLL_PIN_FREQUENCY_1_HZ;
+		esync->pulse = ICE_DPLL_PIN_ESYNC_PULSE_HIGH_PERCENT;
+	} else {
+		esync->freq = 0;
+		esync->pulse = 0;
+	}
+	mutex_unlock(&pf->dplls.lock);
+
+	return 0;
+}
+
 /**
  * ice_dpll_rclk_state_on_pin_set - set a state on rclk pin
  * @pin: pointer to a pin
@@ -1222,6 +1435,8 @@ static const struct dpll_pin_ops ice_dpll_input_ops = {
 	.phase_adjust_get = ice_dpll_pin_phase_adjust_get,
 	.phase_adjust_set = ice_dpll_input_phase_adjust_set,
 	.phase_offset_get = ice_dpll_phase_offset_get,
+	.esync_set = ice_dpll_input_esync_set,
+	.esync_get = ice_dpll_input_esync_get,
 };
 
 static const struct dpll_pin_ops ice_dpll_output_ops = {
@@ -1232,6 +1447,8 @@ static const struct dpll_pin_ops ice_dpll_output_ops = {
 	.direction_get = ice_dpll_output_direction,
 	.phase_adjust_get = ice_dpll_pin_phase_adjust_get,
 	.phase_adjust_set = ice_dpll_output_phase_adjust_set,
+	.esync_set = ice_dpll_output_esync_set,
+	.esync_get = ice_dpll_output_esync_get,
 };
 
 static const struct dpll_device_ops ice_dpll_ops = {

drivers/net/ethernet/intel/ice/ice_dpll.h

@@ -31,6 +31,7 @@ struct ice_dpll_pin {
 	struct dpll_pin_properties prop;
 	u32 freq;
 	s32 phase_adjust;
+	u8 status;
 };
 
 /** ice_dpll - store info required for DPLL control