netdev - [PATCH iwl-next 5/7] ice: Disable shared pin on E810 on setfunc

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Date: Thu, 27 Jun 2024 17:09:29 +0200
From: Karol Kolacinski <karol.kolacinski@...el.com>
To: intel-wired-lan@...ts.osuosl.org
Cc: netdev@...r.kernel.org,
	anthony.l.nguyen@...el.com,
	przemyslaw.kitszel@...el.com,
	Karol Kolacinski <karol.kolacinski@...el.com>,
	Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Subject: [PATCH iwl-next 5/7] ice: Disable shared pin on E810 on setfunc

When setting a new supported function for a pin on E810, disable other
enabled pin that shares the same GPIO.

Reviewed-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@...el.com>
---
 drivers/net/ethernet/intel/ice/ice_ptp.c | 65 ++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/drivers/net/ethernet/intel/ice/ice_ptp.c b/drivers/net/ethernet/intel/ice/ice_ptp.c
index 82b30ea0c8bf..467675dd2693 100644
--- a/drivers/net/ethernet/intel/ice/ice_ptp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ptp.c
@@ -1851,6 +1851,63 @@ static void ice_ptp_enable_all_perout(struct ice_pf *pf)
 					   true);
 }
 
+/**
+ * ice_ptp_disable_shared_pin - Disable enabled pin that shares GPIO
+ * @pf: Board private structure
+ * @pin: Pin index
+ * @func: Assigned function
+ *
+ * Return: 0 on success, negative error code otherwise
+ */
+static int ice_ptp_disable_shared_pin(struct ice_pf *pf, unsigned int pin,
+				      enum ptp_pin_function func)
+{
+	uint gpio_pin, i;
+
+	switch (func) {
+	case PTP_PF_PEROUT:
+		gpio_pin = pf->ptp.ice_pin_desc[pin].gpio[1];
+		break;
+	case PTP_PF_EXTTS:
+		gpio_pin = pf->ptp.ice_pin_desc[pin].gpio[0];
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	for (i = 0; i < pf->ptp.info.n_pins; i++) {
+		struct ptp_pin_desc *pin_desc = &pf->ptp.pin_desc[i];
+		uint chan = pin_desc->chan;
+
+		/* Skip pin idx from the request */
+		if (i == pin)
+			continue;
+
+		if (pin_desc->func == PTP_PF_PEROUT &&
+		    pf->ptp.ice_pin_desc[i].gpio[1] == gpio_pin) {
+			pf->ptp.perout_rqs[chan].period.sec = 0;
+			pf->ptp.perout_rqs[chan].period.nsec = 0;
+			pin_desc->func = PTP_PF_NONE;
+			pin_desc->chan = 0;
+			dev_dbg(ice_pf_to_dev(pf), "Disabling pin %u with shared output GPIO pin %u\n",
+				i, gpio_pin);
+			return ice_ptp_cfg_perout(pf, &pf->ptp.perout_rqs[chan],
+						  false);
+		} else if (pf->ptp.pin_desc->func == PTP_PF_EXTTS &&
+			   pf->ptp.ice_pin_desc[i].gpio[0] == gpio_pin) {
+			pf->ptp.extts_rqs[chan].flags &= ~PTP_ENABLE_FEATURE;
+			pin_desc->func = PTP_PF_NONE;
+			pin_desc->chan = 0;
+			dev_dbg(ice_pf_to_dev(pf), "Disabling pin %u with shared input GPIO pin %u\n",
+				i, gpio_pin);
+			return ice_ptp_cfg_extts(pf, &pf->ptp.extts_rqs[chan],
+						 false);
+		}
+	}
+
+	return 0;
+}
+
 /**
  * ice_verify_pin - verify if pin supports requested pin function
  * @info: the driver's PTP info structure
@@ -1885,6 +1942,14 @@ static int ice_verify_pin(struct ptp_clock_info *info, unsigned int pin,
 		return -EOPNOTSUPP;
 	}
 
+	/* On adapters with SMA_CTRL disable other pins that share same GPIO */
+	if (ice_is_feature_supported(pf, ICE_F_SMA_CTRL)) {
+		ice_ptp_disable_shared_pin(pf, pin, func);
+		pf->ptp.pin_desc[pin].func = func;
+		pf->ptp.pin_desc[pin].chan = chan;
+		return ice_ptp_set_sma_cfg_e810t(pf);
+	}
+
 	return 0;
 }
 
-- 
2.45.2