diff mbox series

[v3,3/5] net: phy: qcom: at803x: Add Qualcomm IPQ5018 Internal PHY support

Message ID 20250602-ipq5018-ge-phy-v3-3-421337a031b2@outlook.com
State New
Headers show
Series Add support for the IPQ5018 Internal GE PHY | expand

Commit Message

George Moussalem via B4 Relay June 2, 2025, 9:53 a.m. UTC 
From: George Moussalem <george.moussalem@outlook.com>

The IPQ5018 SoC contains a single internal Gigabit Ethernet PHY which
provides an MDI interface directly to an RJ45 connector or an external
switch over a PHY to PHY link.

The PHY supports 10/100/1000 mbps link modes, CDT, auto-negotiation and
802.3az EEE.

Let's add support for this PHY in the at803x driver as it falls within
the Qualcomm Atheros OUI.

Signed-off-by: George Moussalem <george.moussalem@outlook.com>
---
 drivers/net/phy/qcom/Kconfig  |   2 +-
 drivers/net/phy/qcom/at803x.c | 185 ++++++++++++++++++++++++++++++++++++++++--
 2 files changed, 178 insertions(+), 9 deletions(-)

Comments

Rob Herring (Arm) June 5, 2025, 6:18 p.m. UTC | #1 
On Mon, Jun 02, 2025 at 02:41:56PM +0200, Andrew Lunn wrote:
> > +	/* PHY DAC values are optional and only set in a PHY to PHY link architecture */
> > +	if (priv->set_short_cable_dac) {
> > +		/* setting MDAC (Multi-level Digital-to-Analog Converter) in MMD1 */
> > +		phy_modify_mmd(phydev, MDIO_MMD_PMAPMD, IPQ5018_PHY_MMD1_MDAC,
> > +			       IPQ5018_PHY_DAC_MASK, IPQ5018_PHY_MMD1_MDAC_VAL);
> > +
> > +		/* setting EDAC (Error-detection and Correction) in debug register */
> > +		at803x_debug_reg_mask(phydev, IPQ5018_PHY_DEBUG_EDAC,
> > +				      IPQ5018_PHY_DAC_MASK, IPQ5018_PHY_DEBUG_EDAC_VAL);
> > +	}
> 
> In the binding you say:
> 
> 
> +            If not set, it is assumed the MDI output pins of this PHY are directly
> +            connected to an RJ45 connector and default DAC values will be used.
> 
> So shouldn't there be an else clause here setting these two values to
> their default, undoing what the bootloader might of done etc.
> 
> Or you can change the binding, and say something like:
> 
> +            If not set, DAC values are not modified.
> 
> We often need a tristate in DT, set something, unset something, leave
> it as it is. But that does not exist in DT in an easy form :-(

I'm happy to define that and have thought about it. That does up the 
minimum version of dtschema required, but we pretty much expect people 
to use the latest anyways.

Rob
diff mbox series

Patch

diff --git a/drivers/net/phy/qcom/Kconfig b/drivers/net/phy/qcom/Kconfig
index 570626cc8e14d3e6615f74a6377f0f7c9f723e89..84239e08a8dfa466b0a7b2a5ec724a168b692cd2 100644
--- a/drivers/net/phy/qcom/Kconfig
+++ b/drivers/net/phy/qcom/Kconfig
@@ -7,7 +7,7 @@  config AT803X_PHY
 	select QCOM_NET_PHYLIB
 	depends on REGULATOR
 	help
-	  Currently supports the AR8030, AR8031, AR8033, AR8035 model
+	  Currently supports the AR8030, AR8031, AR8033, AR8035, IPQ5018 model
 
 config QCA83XX_PHY
 	tristate "Qualcomm Atheros QCA833x PHYs"
diff --git a/drivers/net/phy/qcom/at803x.c b/drivers/net/phy/qcom/at803x.c
index 26350b962890b0321153d74758b13d817407d094..c148e245b5391c5da374ace8609dcdfd8284732d 100644
--- a/drivers/net/phy/qcom/at803x.c
+++ b/drivers/net/phy/qcom/at803x.c
@@ -7,19 +7,24 @@ 
  * Author: Matus Ujhelyi <ujhelyi.m@gmail.com>
  */
 
-#include <linux/phy.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/netdevice.h>
+#include <linux/bitfield.h>
+#include <linux/clk.h>
+#include <linux/clk-provider.h>
 #include <linux/etherdevice.h>
 #include <linux/ethtool_netlink.h>
-#include <linux/bitfield.h>
-#include <linux/regulator/of_regulator.h>
-#include <linux/regulator/driver.h>
-#include <linux/regulator/consumer.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/netdevice.h>
 #include <linux/of.h>
+#include <linux/phy.h>
 #include <linux/phylink.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/driver.h>
+#include <linux/regulator/of_regulator.h>
+#include <linux/reset.h>
 #include <linux/sfp.h>
+#include <linux/string.h>
 #include <dt-bindings/net/qca-ar803x.h>
 
 #include "qcom.h"
@@ -96,6 +101,8 @@ 
 #define ATH8035_PHY_ID				0x004dd072
 #define AT8030_PHY_ID_MASK			0xffffffef
 
+#define IPQ5018_PHY_ID				0x004dd0c0
+
 #define QCA9561_PHY_ID				0x004dd042
 
 #define AT803X_PAGE_FIBER			0
@@ -108,6 +115,50 @@ 
 /* disable hibernation mode */
 #define AT803X_DISABLE_HIBERNATION_MODE		BIT(2)
 
+#define IPQ5018_PHY_FIFO_CONTROL		0x19
+#define IPQ5018_PHY_FIFO_RESET			GENMASK(1, 0)
+
+#define IPQ5018_PHY_DEBUG_EDAC			0x4380
+#define IPQ5018_PHY_MMD1_MDAC			0x8100
+#define IPQ5018_PHY_DAC_MASK			GENMASK(15, 8)
+
+/* MDAC and EDAC values for short cable length */
+#define IPQ5018_PHY_DEBUG_EDAC_VAL		0x10
+#define IPQ5018_PHY_MMD1_MDAC_VAL		0x10
+
+#define IPQ5018_PHY_MMD1_MSE_THRESH1		0x1000
+#define IPQ5018_PHY_MMD1_MSE_THRESH2		0x1001
+#define IPQ5018_PHY_PCS_AZ_CTRL1		0x8008
+#define IPQ5018_PHY_PCS_AZ_CTRL2		0x8009
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL3	0x8074
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL4	0x8075
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL5	0x8076
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL6	0x8077
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL7	0x8078
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL9	0x807a
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL13	0x807e
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL14	0x807f
+
+#define IPQ5018_PHY_MMD1_MSE_THRESH1_VAL	0xf1
+#define IPQ5018_PHY_MMD1_MSE_THRESH2_VAL	0x1f6
+#define IPQ5018_PHY_PCS_AZ_CTRL1_VAL		0x7880
+#define IPQ5018_PHY_PCS_AZ_CTRL2_VAL		0xc8
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL3_VAL	0xc040
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL4_VAL	0xa060
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL5_VAL	0xc040
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL6_VAL	0xa060
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL7_VAL	0xc24c
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL9_VAL	0xc060
+#define IPQ5018_PHY_PCS_CDT_THRESH_CTRL13_VAL	0xb060
+#define IPQ5018_PHY_PCS_NEAR_ECHO_THRESH_VAL	0x90b0
+
+#define IPQ5018_PHY_DEBUG_ANA_LDO_EFUSE		0x1
+#define IPQ5018_PHY_DEBUG_ANA_LDO_EFUSE_MASK	GENMASK(7, 4)
+#define IPQ5018_PHY_DEBUG_ANA_LDO_EFUSE_DEFAULT	0x50
+#define IPQ5018_PHY_DEBUG_ANA_DAC_FILTER	0xa080
+
+#define IPQ5018_TCSR_ETH_LDO_READY		BIT(0)
+
 MODULE_DESCRIPTION("Qualcomm Atheros AR803x PHY driver");
 MODULE_AUTHOR("Matus Ujhelyi");
 MODULE_LICENSE("GPL");
@@ -133,6 +184,11 @@  struct at803x_context {
 	u16 led_control;
 };
 
+struct ipq5018_priv {
+	struct reset_control *rst;
+	bool set_short_cable_dac;
+};
+
 static int at803x_write_page(struct phy_device *phydev, int page)
 {
 	int mask;
@@ -987,6 +1043,105 @@  static int at8035_probe(struct phy_device *phydev)
 	return at8035_parse_dt(phydev);
 }
 
+static int ipq5018_cable_test_start(struct phy_device *phydev)
+{
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL3,
+		      IPQ5018_PHY_PCS_CDT_THRESH_CTRL3_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL4,
+		      IPQ5018_PHY_PCS_CDT_THRESH_CTRL4_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL5,
+		      IPQ5018_PHY_PCS_CDT_THRESH_CTRL5_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL6,
+		      IPQ5018_PHY_PCS_CDT_THRESH_CTRL6_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL7,
+		      IPQ5018_PHY_PCS_CDT_THRESH_CTRL7_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL9,
+		      IPQ5018_PHY_PCS_CDT_THRESH_CTRL9_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL13,
+		      IPQ5018_PHY_PCS_CDT_THRESH_CTRL13_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_CDT_THRESH_CTRL3,
+		      IPQ5018_PHY_PCS_NEAR_ECHO_THRESH_VAL);
+
+	/* we do all the (time consuming) work later */
+	return 0;
+}
+
+static int ipq5018_config_init(struct phy_device *phydev)
+{
+	struct ipq5018_priv *priv = phydev->priv;
+	u16 val = 0;
+
+	/*
+	 * set LDO efuse: first temporarily store ANA_DAC_FILTER value from
+	 * debug register as it will be reset once the ANA_LDO_EFUSE register
+	 * is written to
+	 */
+	val = at803x_debug_reg_read(phydev, IPQ5018_PHY_DEBUG_ANA_DAC_FILTER);
+	at803x_debug_reg_mask(phydev, IPQ5018_PHY_DEBUG_ANA_LDO_EFUSE,
+			      IPQ5018_PHY_DEBUG_ANA_LDO_EFUSE_MASK,
+			      IPQ5018_PHY_DEBUG_ANA_LDO_EFUSE_DEFAULT);
+	at803x_debug_reg_write(phydev, IPQ5018_PHY_DEBUG_ANA_DAC_FILTER, val);
+
+	/* set 8023AZ CTRL values */
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_AZ_CTRL1,
+		      IPQ5018_PHY_PCS_AZ_CTRL1_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PCS, IPQ5018_PHY_PCS_AZ_CTRL2,
+		      IPQ5018_PHY_PCS_AZ_CTRL2_VAL);
+
+	/* set MSE threshold values */
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, IPQ5018_PHY_MMD1_MSE_THRESH1,
+		      IPQ5018_PHY_MMD1_MSE_THRESH1_VAL);
+	phy_write_mmd(phydev, MDIO_MMD_PMAPMD, IPQ5018_PHY_MMD1_MSE_THRESH2,
+		      IPQ5018_PHY_MMD1_MSE_THRESH2_VAL);
+
+	/* PHY DAC values are optional and only set in a PHY to PHY link architecture */
+	if (priv->set_short_cable_dac) {
+		/* setting MDAC (Multi-level Digital-to-Analog Converter) in MMD1 */
+		phy_modify_mmd(phydev, MDIO_MMD_PMAPMD, IPQ5018_PHY_MMD1_MDAC,
+			       IPQ5018_PHY_DAC_MASK, IPQ5018_PHY_MMD1_MDAC_VAL);
+
+		/* setting EDAC (Error-detection and Correction) in debug register */
+		at803x_debug_reg_mask(phydev, IPQ5018_PHY_DEBUG_EDAC,
+				      IPQ5018_PHY_DAC_MASK, IPQ5018_PHY_DEBUG_EDAC_VAL);
+	}
+
+	return 0;
+}
+
+static void ipq5018_link_change_notify(struct phy_device *phydev)
+{
+	mdiobus_modify_changed(phydev->mdio.bus, phydev->mdio.addr,
+			       IPQ5018_PHY_FIFO_CONTROL, IPQ5018_PHY_FIFO_RESET,
+			       phydev->link ? IPQ5018_PHY_FIFO_RESET : 0);
+}
+
+static int ipq5018_probe(struct phy_device *phydev)
+{
+	struct device *dev = &phydev->mdio.dev;
+	struct ipq5018_priv *priv;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->set_short_cable_dac = of_property_read_bool(dev->of_node,
+							  "qcom,dac-preset-short-cable");
+
+	priv->rst = devm_reset_control_array_get_exclusive(dev);
+	if (IS_ERR_OR_NULL(priv->rst))
+		return dev_err_probe(dev, PTR_ERR(priv->rst),
+				     "failed to acquire reset\n");
+
+	ret = reset_control_reset(priv->rst);
+	if (ret)
+		return dev_err_probe(dev, ret, "failed to reset\n");
+
+	phydev->priv = priv;
+
+	return 0;
+}
+
 static struct phy_driver at803x_driver[] = {
 {
 	/* Qualcomm Atheros AR8035 */
@@ -1078,6 +1233,19 @@  static struct phy_driver at803x_driver[] = {
 	.read_status		= at803x_read_status,
 	.soft_reset		= genphy_soft_reset,
 	.config_aneg		= at803x_config_aneg,
+}, {
+	PHY_ID_MATCH_EXACT(IPQ5018_PHY_ID),
+	.name			= "Qualcomm Atheros IPQ5018 internal PHY",
+	.flags			= PHY_IS_INTERNAL | PHY_POLL_CABLE_TEST,
+	.probe			= ipq5018_probe,
+	.config_init		= ipq5018_config_init,
+	.link_change_notify	= ipq5018_link_change_notify,
+	.read_status		= at803x_read_status,
+	.config_intr		= at803x_config_intr,
+	.handle_interrupt	= at803x_handle_interrupt,
+	.cable_test_start	= ipq5018_cable_test_start,
+	.cable_test_get_status	= qca808x_cable_test_get_status,
+	.soft_reset		= genphy_soft_reset,
 }, {
 	/* Qualcomm Atheros QCA9561 */
 	PHY_ID_MATCH_EXACT(QCA9561_PHY_ID),
@@ -1104,6 +1272,7 @@  static const struct mdio_device_id __maybe_unused atheros_tbl[] = {
 	{ PHY_ID_MATCH_EXACT(ATH8032_PHY_ID) },
 	{ PHY_ID_MATCH_EXACT(ATH8035_PHY_ID) },
 	{ PHY_ID_MATCH_EXACT(ATH9331_PHY_ID) },
+	{ PHY_ID_MATCH_EXACT(IPQ5018_PHY_ID) },
 	{ PHY_ID_MATCH_EXACT(QCA9561_PHY_ID) },
 	{ }
 };