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From: Christian Marangi <ansuelsmth@gmail.com>
To: Alexandre Torgue <alexandre.torgue@foss.st.com>,
	Jose Abreu <joabreu@synopsys.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>,
	Paolo Abeni <pabeni@redhat.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	netdev@vger.kernel.org,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: Christian Marangi <ansuelsmth@gmail.com>
Subject: [net-next PATCH] net: stmmac: dwmac-ipq806x: account for rgmii-txid/rxid/id phy-mode
Date: Mon,  6 May 2024 14:32:46 +0200
Message-ID: <20240506123248.17740-1-ansuelsmth@gmail.com>
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Currently the ipq806x dwmac driver is almost always used attached to the
CPU port of a switch and phy-mode was always set to "rgmii" or "sgmii".

Some device came up with a special configuration where the PHY is
directly attached to the GMAC port and in those case phy-mode needs to
be set to "rgmii-id" to make the PHY correctly work and receive packets.

Since the driver supports only "rgmii" and "sgmii" mode, when "rgmii-id"
(or variants) mode is set, the mode is rejected and probe fails.

Add support also for these phy-modes to correctly setup PHYs that requires
delay applied to tx/rx.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
index 281687d7083b..4ba15873d5b1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-ipq806x.c
@@ -171,6 +171,9 @@ static int ipq806x_gmac_set_speed(struct ipq806x_gmac *gmac, unsigned int speed)
 
 	switch (gmac->phy_mode) {
 	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
 		div = get_clk_div_rgmii(gmac, speed);
 		clk_bits = NSS_COMMON_CLK_GATE_RGMII_RX_EN(gmac->id) |
 			   NSS_COMMON_CLK_GATE_RGMII_TX_EN(gmac->id);
@@ -410,6 +413,9 @@ static int ipq806x_gmac_probe(struct platform_device *pdev)
 	val |= NSS_COMMON_GMAC_CTL_CSYS_REQ;
 	switch (gmac->phy_mode) {
 	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
 		val |= NSS_COMMON_GMAC_CTL_PHY_IFACE_SEL;
 		break;
 	case PHY_INTERFACE_MODE_SGMII:
@@ -425,6 +431,9 @@ static int ipq806x_gmac_probe(struct platform_device *pdev)
 	val &= ~(1 << NSS_COMMON_CLK_SRC_CTRL_OFFSET(gmac->id));
 	switch (gmac->phy_mode) {
 	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
 		val |= NSS_COMMON_CLK_SRC_CTRL_RGMII(gmac->id) <<
 			NSS_COMMON_CLK_SRC_CTRL_OFFSET(gmac->id);
 		break;
@@ -442,6 +451,9 @@ static int ipq806x_gmac_probe(struct platform_device *pdev)
 	val |= NSS_COMMON_CLK_GATE_PTP_EN(gmac->id);
 	switch (gmac->phy_mode) {
 	case PHY_INTERFACE_MODE_RGMII:
+	case PHY_INTERFACE_MODE_RGMII_ID:
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+	case PHY_INTERFACE_MODE_RGMII_TXID:
 		val |= NSS_COMMON_CLK_GATE_RGMII_RX_EN(gmac->id) |
 			NSS_COMMON_CLK_GATE_RGMII_TX_EN(gmac->id);
 		break;
-- 
2.43.0