netdev - [PATCH v8 17/30] soc: fsl: cpm1: qmc: Add support for disabling channel TSA entries

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Date: Wed, 11 Oct 2023 08:14:21 +0200
From: Herve Codina <herve.codina@...tlin.com>
To: Herve Codina <herve.codina@...tlin.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Andrew Lunn <andrew@...n.ch>,
	Rob Herring <robh+dt@...nel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Lee Jones <lee@...nel.org>,
	Linus Walleij <linus.walleij@...aro.org>,
	Qiang Zhao <qiang.zhao@....com>,
	Li Yang <leoyang.li@....com>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nel.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Shengjiu Wang <shengjiu.wang@...il.com>,
	Xiubo Li <Xiubo.Lee@...il.com>,
	Fabio Estevam <festevam@...il.com>,
	Nicolin Chen <nicoleotsuka@...il.com>,
	Christophe Leroy <christophe.leroy@...roup.eu>,
	Randy Dunlap <rdunlap@...radead.org>
Cc: netdev@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	linux-gpio@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	alsa-devel@...a-project.org,
	Simon Horman <horms@...nel.org>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: [PATCH v8 17/30] soc: fsl: cpm1: qmc: Add support for disabling channel TSA entries

In order to allow runtime timeslot route changes, disabling channel TSA
entries needs to be supported.

Add support for this new feature.

Signed-off-by: Herve Codina <herve.codina@...tlin.com>
Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 drivers/soc/fsl/qe/qmc.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c
index 269d10cd3c7a..26cd7e1ccafc 100644
--- a/drivers/soc/fsl/qe/qmc.c
+++ b/drivers/soc/fsl/qe/qmc.c
@@ -567,7 +567,8 @@ static void qmc_chan_read_done(struct qmc_chan *chan)
 	spin_unlock_irqrestore(&chan->rx_lock, flags);
 }
 
-static int qmc_chan_setup_tsa_64rxtx(struct qmc_chan *chan, const struct tsa_serial_info *info)
+static int qmc_chan_setup_tsa_64rxtx(struct qmc_chan *chan, const struct tsa_serial_info *info,
+				     bool enable)
 {
 	unsigned int i;
 	u16 curr;
@@ -603,13 +604,14 @@ static int qmc_chan_setup_tsa_64rxtx(struct qmc_chan *chan, const struct tsa_ser
 			continue;
 
 		qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2),
-				 ~QMC_TSA_WRAP, val);
+				 ~QMC_TSA_WRAP, enable ? val : 0x0000);
 	}
 
 	return 0;
 }
 
-static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_serial_info *info)
+static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_serial_info *info,
+					bool enable)
 {
 	unsigned int i;
 	u16 curr;
@@ -650,7 +652,7 @@ static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_
 			continue;
 
 		qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATRX + (i * 2),
-				 ~QMC_TSA_WRAP, val);
+				 ~QMC_TSA_WRAP, enable ? val : 0x0000);
 	}
 	/* Set entries based on Tx stuff */
 	for (i = 0; i < info->nb_tx_ts; i++) {
@@ -658,13 +660,13 @@ static int qmc_chan_setup_tsa_32rx_32tx(struct qmc_chan *chan, const struct tsa_
 			continue;
 
 		qmc_clrsetbits16(chan->qmc->scc_pram + QMC_GBL_TSATTX + (i * 2),
-				 ~QMC_TSA_WRAP, val);
+				 ~QMC_TSA_WRAP, enable ? val : 0x0000);
 	}
 
 	return 0;
 }
 
-static int qmc_chan_setup_tsa(struct qmc_chan *chan)
+static int qmc_chan_setup_tsa(struct qmc_chan *chan, bool enable)
 {
 	struct tsa_serial_info info;
 	int ret;
@@ -679,8 +681,8 @@ static int qmc_chan_setup_tsa(struct qmc_chan *chan)
 	 * and one for Tx) according to assigned TS numbers.
 	 */
 	return ((info.nb_tx_ts > 32) || (info.nb_rx_ts > 32)) ?
-		qmc_chan_setup_tsa_64rxtx(chan, &info) :
-		qmc_chan_setup_tsa_32rx_32tx(chan, &info);
+		qmc_chan_setup_tsa_64rxtx(chan, &info, enable) :
+		qmc_chan_setup_tsa_32rx_32tx(chan, &info, enable);
 }
 
 static int qmc_chan_command(struct qmc_chan *chan, u8 qmc_opcode)
@@ -1146,7 +1148,7 @@ static int qmc_setup_chan(struct qmc *qmc, struct qmc_chan *chan)
 
 	chan->qmc = qmc;
 
-	ret = qmc_chan_setup_tsa(chan);
+	ret = qmc_chan_setup_tsa(chan, true);
 	if (ret)
 		return ret;
 
-- 
2.41.0