From a719f7ba7fcba05d85801c6f0267f389a21627c1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Pali=20Roh=C3=A1r?= <pali@kernel.org>
Date: Fri, 24 Sep 2021 13:03:02 +0200
Subject: [PATCH] phy: marvell: phy-mvebu-a3700-comphy: Remove port from driver
 configuration
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Port number is encoded into argument for SMC call. It is zero for SATA,
PCIe and also both USB 3.0 PHYs. It is non-zero only for Ethernet PHY
(incorrectly called SGMII) on lane 0. Ethernet PHY on lane 1 also uses zero
port number.

So construct "port" bits for SMC call argument can be constructed directly
from PHY type and lane number.

Change driver code to always pass zero port number for non-ethernet PHYs
and for ethernet PHYs determinate port number from lane number. This
simplifies the driver.

As port number from DT PHY configuration is not used anymore, remove whole
driver code which parses it. This also simplifies the driver.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Marek Behún <kabel@kernel.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
---
 drivers/phy/marvell/phy-mvebu-a3700-comphy.c | 62 +++++++++-----------
 1 file changed, 29 insertions(+), 33 deletions(-)

--- a/drivers/phy/marvell/phy-mvebu-a3700-comphy.c
+++ b/drivers/phy/marvell/phy-mvebu-a3700-comphy.c
@@ -20,7 +20,6 @@
 #include <linux/platform_device.h>
 
 #define MVEBU_A3700_COMPHY_LANES		3
-#define MVEBU_A3700_COMPHY_PORTS		2
 
 /* COMPHY Fast SMC function identifiers */
 #define COMPHY_SIP_POWER_ON			0x82000001
@@ -45,51 +44,47 @@
 #define COMPHY_FW_NET(mode, idx, speed)		(COMPHY_FW_MODE(mode) | \
 						 ((idx) << 8) |	\
 						 ((speed) << 2))
-#define COMPHY_FW_PCIE(mode, idx, speed, width)	(COMPHY_FW_NET(mode, idx, speed) | \
+#define COMPHY_FW_PCIE(mode, speed, width)	(COMPHY_FW_NET(mode, 0, speed) | \
 						 ((width) << 18))
 
 struct mvebu_a3700_comphy_conf {
 	unsigned int lane;
 	enum phy_mode mode;
 	int submode;
-	unsigned int port;
 	u32 fw_mode;
 };
 
-#define MVEBU_A3700_COMPHY_CONF(_lane, _mode, _smode, _port, _fw)	\
+#define MVEBU_A3700_COMPHY_CONF(_lane, _mode, _smode, _fw)		\
 	{								\
 		.lane = _lane,						\
 		.mode = _mode,						\
 		.submode = _smode,					\
-		.port = _port,						\
 		.fw_mode = _fw,						\
 	}
 
-#define MVEBU_A3700_COMPHY_CONF_GEN(_lane, _mode, _port, _fw) \
-	MVEBU_A3700_COMPHY_CONF(_lane, _mode, PHY_INTERFACE_MODE_NA, _port, _fw)
+#define MVEBU_A3700_COMPHY_CONF_GEN(_lane, _mode, _fw) \
+	MVEBU_A3700_COMPHY_CONF(_lane, _mode, PHY_INTERFACE_MODE_NA, _fw)
 
-#define MVEBU_A3700_COMPHY_CONF_ETH(_lane, _smode, _port, _fw) \
-	MVEBU_A3700_COMPHY_CONF(_lane, PHY_MODE_ETHERNET, _smode, _port, _fw)
+#define MVEBU_A3700_COMPHY_CONF_ETH(_lane, _smode, _fw) \
+	MVEBU_A3700_COMPHY_CONF(_lane, PHY_MODE_ETHERNET, _smode, _fw)
 
 static const struct mvebu_a3700_comphy_conf mvebu_a3700_comphy_modes[] = {
 	/* lane 0 */
-	MVEBU_A3700_COMPHY_CONF_GEN(0, PHY_MODE_USB_HOST_SS, 0,
+	MVEBU_A3700_COMPHY_CONF_GEN(0, PHY_MODE_USB_HOST_SS,
 				    COMPHY_FW_MODE_USB3H),
-	MVEBU_A3700_COMPHY_CONF_ETH(0, PHY_INTERFACE_MODE_SGMII, 1,
+	MVEBU_A3700_COMPHY_CONF_ETH(0, PHY_INTERFACE_MODE_SGMII,
 				    COMPHY_FW_MODE_SGMII),
-	MVEBU_A3700_COMPHY_CONF_ETH(0, PHY_INTERFACE_MODE_2500BASEX, 1,
+	MVEBU_A3700_COMPHY_CONF_ETH(0, PHY_INTERFACE_MODE_2500BASEX,
 				    COMPHY_FW_MODE_2500BASEX),
 	/* lane 1 */
-	MVEBU_A3700_COMPHY_CONF_GEN(1, PHY_MODE_PCIE, 0,
-				    COMPHY_FW_MODE_PCIE),
-	MVEBU_A3700_COMPHY_CONF_ETH(1, PHY_INTERFACE_MODE_SGMII, 0,
+	MVEBU_A3700_COMPHY_CONF_GEN(1, PHY_MODE_PCIE, COMPHY_FW_MODE_PCIE),
+	MVEBU_A3700_COMPHY_CONF_ETH(1, PHY_INTERFACE_MODE_SGMII,
 				    COMPHY_FW_MODE_SGMII),
-	MVEBU_A3700_COMPHY_CONF_ETH(1, PHY_INTERFACE_MODE_2500BASEX, 0,
+	MVEBU_A3700_COMPHY_CONF_ETH(1, PHY_INTERFACE_MODE_2500BASEX,
 				    COMPHY_FW_MODE_2500BASEX),
 	/* lane 2 */
-	MVEBU_A3700_COMPHY_CONF_GEN(2, PHY_MODE_SATA, 0,
-				    COMPHY_FW_MODE_SATA),
-	MVEBU_A3700_COMPHY_CONF_GEN(2, PHY_MODE_USB_HOST_SS, 0,
+	MVEBU_A3700_COMPHY_CONF_GEN(2, PHY_MODE_SATA, COMPHY_FW_MODE_SATA),
+	MVEBU_A3700_COMPHY_CONF_GEN(2, PHY_MODE_USB_HOST_SS,
 				    COMPHY_FW_MODE_USB3H),
 };
 
@@ -98,7 +93,6 @@ struct mvebu_a3700_comphy_lane {
 	unsigned int id;
 	enum phy_mode mode;
 	int submode;
-	int port;
 };
 
 static int mvebu_a3700_comphy_smc(unsigned long function, unsigned long lane,
@@ -120,7 +114,7 @@ static int mvebu_a3700_comphy_smc(unsign
 	}
 }
 
-static int mvebu_a3700_comphy_get_fw_mode(int lane, int port,
+static int mvebu_a3700_comphy_get_fw_mode(int lane,
 					  enum phy_mode mode,
 					  int submode)
 {
@@ -132,7 +126,6 @@ static int mvebu_a3700_comphy_get_fw_mod
 
 	for (i = 0; i < n; i++) {
 		if (mvebu_a3700_comphy_modes[i].lane == lane &&
-		    mvebu_a3700_comphy_modes[i].port == port &&
 		    mvebu_a3700_comphy_modes[i].mode == mode &&
 		    mvebu_a3700_comphy_modes[i].submode == submode)
 			break;
@@ -153,7 +146,7 @@ static int mvebu_a3700_comphy_set_mode(s
 	if (submode == PHY_INTERFACE_MODE_1000BASEX)
 		submode = PHY_INTERFACE_MODE_SGMII;
 
-	fw_mode = mvebu_a3700_comphy_get_fw_mode(lane->id, lane->port, mode,
+	fw_mode = mvebu_a3700_comphy_get_fw_mode(lane->id, mode,
 						 submode);
 	if (fw_mode < 0) {
 		dev_err(lane->dev, "invalid COMPHY mode\n");
@@ -172,9 +165,10 @@ static int mvebu_a3700_comphy_power_on(s
 	struct mvebu_a3700_comphy_lane *lane = phy_get_drvdata(phy);
 	u32 fw_param;
 	int fw_mode;
+	int fw_port;
 	int ret;
 
-	fw_mode = mvebu_a3700_comphy_get_fw_mode(lane->id, lane->port,
+	fw_mode = mvebu_a3700_comphy_get_fw_mode(lane->id,
 						 lane->mode, lane->submode);
 	if (fw_mode < 0) {
 		dev_err(lane->dev, "invalid COMPHY mode\n");
@@ -191,17 +185,18 @@ static int mvebu_a3700_comphy_power_on(s
 		fw_param = COMPHY_FW_MODE(fw_mode);
 		break;
 	case PHY_MODE_ETHERNET:
+		fw_port = (lane->id == 0) ? 1 : 0;
 		switch (lane->submode) {
 		case PHY_INTERFACE_MODE_SGMII:
 			dev_dbg(lane->dev, "set lane %d to SGMII mode\n",
 				lane->id);
-			fw_param = COMPHY_FW_NET(fw_mode, lane->port,
+			fw_param = COMPHY_FW_NET(fw_mode, fw_port,
 						 COMPHY_FW_SPEED_1_25G);
 			break;
 		case PHY_INTERFACE_MODE_2500BASEX:
 			dev_dbg(lane->dev, "set lane %d to 2500BASEX mode\n",
 				lane->id);
-			fw_param = COMPHY_FW_NET(fw_mode, lane->port,
+			fw_param = COMPHY_FW_NET(fw_mode, fw_port,
 						 COMPHY_FW_SPEED_3_125G);
 			break;
 		default:
@@ -212,8 +207,7 @@ static int mvebu_a3700_comphy_power_on(s
 		break;
 	case PHY_MODE_PCIE:
 		dev_dbg(lane->dev, "set lane %d to PCIe mode\n", lane->id);
-		fw_param = COMPHY_FW_PCIE(fw_mode, lane->port,
-					  COMPHY_FW_SPEED_5G,
+		fw_param = COMPHY_FW_PCIE(fw_mode, COMPHY_FW_SPEED_5G,
 					  phy->attrs.bus_width);
 		break;
 	default:
@@ -247,17 +241,20 @@ static struct phy *mvebu_a3700_comphy_xl
 					    struct of_phandle_args *args)
 {
 	struct mvebu_a3700_comphy_lane *lane;
+	unsigned int port;
 	struct phy *phy;
 
-	if (WARN_ON(args->args[0] >= MVEBU_A3700_COMPHY_PORTS))
-		return ERR_PTR(-EINVAL);
-
 	phy = of_phy_simple_xlate(dev, args);
 	if (IS_ERR(phy))
 		return phy;
 
 	lane = phy_get_drvdata(phy);
-	lane->port = args->args[0];
+
+	port = args->args[0];
+	if (port != 0 && (port != 1 || lane->id != 0)) {
+		dev_err(lane->dev, "invalid port number %u\n", port);
+		return ERR_PTR(-EINVAL);
+	}
 
 	return phy;
 }
@@ -302,7 +299,6 @@ static int mvebu_a3700_comphy_probe(stru
 		lane->mode = PHY_MODE_INVALID;
 		lane->submode = PHY_INTERFACE_MODE_NA;
 		lane->id = lane_id;
-		lane->port = -1;
 		phy_set_drvdata(phy, lane);
 	}
 
