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From: Chunfeng Yun <chunfeng.yun@mediatek.com>
To: Vinod Koul <vkoul@kernel.org>, Rob Herring <robh+dt@kernel.org>,
	Chun-Kuang Hu <chunkuang.hu@kernel.org>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>,
	Kishon Vijay Abraham I <kishon@ti.com>,
	Philipp Zabel <p.zabel@pengutronix.de>,
	Matthias Brugger <matthias.bgg@gmail.com>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-mediatek@lists.infradead.org>,
	<linux-phy@lists.infradead.org>, <devicetree@vger.kernel.org>,
	<linux-kernel@vger.kernel.org>, <dri-devel@lists.freedesktop.org>,
	Eddie Hung <eddie.hung@mediatek.com>
Subject: [PATCH 3/9] phy: phy-mtk-tphy: support type switch by pericfg
Date: Wed, 28 Jul 2021 15:58:25 +0800	[thread overview]
Message-ID: <1627459111-2907-3-git-send-email-chunfeng.yun@mediatek.com> (raw)
In-Reply-To: <1627459111-2907-1-git-send-email-chunfeng.yun@mediatek.com>

Add support type switch between USB3, PCIe, SATA and SGMII by
pericfg register, this is used to take the place of efuse or
jumper.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
 drivers/phy/mediatek/phy-mtk-tphy.c | 84 ++++++++++++++++++++++++++++-
 1 file changed, 82 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/mediatek/phy-mtk-tphy.c b/drivers/phy/mediatek/phy-mtk-tphy.c
index 3259210f08a1..a6502058a1a5 100644
--- a/drivers/phy/mediatek/phy-mtk-tphy.c
+++ b/drivers/phy/mediatek/phy-mtk-tphy.c
@@ -10,11 +10,13 @@
 #include <linux/delay.h>
 #include <linux/io.h>
 #include <linux/iopoll.h>
+#include <linux/mfd/syscon.h>
 #include <linux/module.h>
 #include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/phy/phy.h>
 #include <linux/platform_device.h>
+#include <linux/regmap.h>
 
 /* version V1 sub-banks offset base address */
 /* banks shared by multiple phys */
@@ -280,6 +282,14 @@
 #define RG_CDR_BIRLTD0_GEN3_MSK		GENMASK(4, 0)
 #define RG_CDR_BIRLTD0_GEN3_VAL(x)	(0x1f & (x))
 
+/* PHY switch between pcie/usb3/sgmii/sata */
+#define USB_PHY_SWITCH_CTRL	0x0
+#define RG_PHY_SW_TYPE		GENMASK(3, 0)
+#define RG_PHY_SW_PCIE		0x0
+#define RG_PHY_SW_USB3		0x1
+#define RG_PHY_SW_SGMII		0x2
+#define RG_PHY_SW_SATA		0x3
+
 #define TPHY_CLKS_CNT	2
 
 enum mtk_phy_version {
@@ -322,7 +332,10 @@ struct mtk_phy_instance {
 	};
 	struct clk_bulk_data clks[TPHY_CLKS_CNT];
 	u32 index;
-	u8 type;
+	u32 type;
+	struct regmap *type_sw;
+	u32 type_sw_reg;
+	u32 type_sw_index;
 	int eye_src;
 	int eye_vrt;
 	int eye_term;
@@ -969,6 +982,64 @@ static void u2_phy_props_set(struct mtk_tphy *tphy,
 	}
 }
 
+/* type switch for usb3/pcie/sgmii/sata */
+static int phy_type_syscon_get(struct mtk_phy_instance *instance,
+			       struct device_node *dn)
+{
+	struct of_phandle_args args;
+	int ret;
+
+	/* type switch function is optional */
+	if (!of_property_read_bool(dn, "mediatek,syscon-type"))
+		return 0;
+
+	ret = of_parse_phandle_with_fixed_args(dn, "mediatek,syscon-type",
+					       2, 0, &args);
+	if (ret)
+		return ret;
+
+	instance->type_sw_reg = args.args[0];
+	instance->type_sw_index = args.args[1] & 0x3; /* <=3 */
+	instance->type_sw = syscon_node_to_regmap(args.np);
+	of_node_put(args.np);
+	dev_info(&instance->phy->dev, "type_sw - reg %#x, index %d\n",
+		 instance->type_sw_reg, instance->type_sw_index);
+
+	return PTR_ERR_OR_ZERO(instance->type_sw);
+}
+
+static int phy_type_set(struct mtk_phy_instance *instance)
+{
+	int type;
+	u32 mask;
+
+	if (!instance->type_sw)
+		return 0;
+
+	switch (instance->type) {
+	case PHY_TYPE_USB3:
+		type = RG_PHY_SW_USB3;
+		break;
+	case PHY_TYPE_PCIE:
+		type = RG_PHY_SW_PCIE;
+		break;
+	case PHY_TYPE_SGMII:
+		type = RG_PHY_SW_SGMII;
+		break;
+	case PHY_TYPE_SATA:
+		type = RG_PHY_SW_SATA;
+		break;
+	case PHY_TYPE_USB2:
+	default:
+		return 0;
+	}
+
+	mask = RG_PHY_SW_TYPE << (instance->type_sw_index * BITS_PER_BYTE);
+	regmap_update_bits(instance->type_sw, instance->type_sw_reg, mask, type);
+
+	return 0;
+}
+
 static int mtk_phy_init(struct phy *phy)
 {
 	struct mtk_phy_instance *instance = phy_get_drvdata(phy);
@@ -993,6 +1064,9 @@ static int mtk_phy_init(struct phy *phy)
 	case PHY_TYPE_SATA:
 		sata_phy_instance_init(tphy, instance);
 		break;
+	case PHY_TYPE_SGMII:
+		/* nothing to do, only used to set type */
+		break;
 	default:
 		dev_err(tphy->dev, "incompatible PHY type\n");
 		clk_bulk_disable_unprepare(TPHY_CLKS_CNT, instance->clks);
@@ -1081,7 +1155,8 @@ static struct phy *mtk_phy_xlate(struct device *dev,
 	if (!(instance->type == PHY_TYPE_USB2 ||
 	      instance->type == PHY_TYPE_USB3 ||
 	      instance->type == PHY_TYPE_PCIE ||
-	      instance->type == PHY_TYPE_SATA)) {
+	      instance->type == PHY_TYPE_SATA ||
+	      instance->type == PHY_TYPE_SGMII)) {
 		dev_err(dev, "unsupported device type: %d\n", instance->type);
 		return ERR_PTR(-EINVAL);
 	}
@@ -1100,6 +1175,7 @@ static struct phy *mtk_phy_xlate(struct device *dev,
 	}
 
 	phy_parse_property(tphy, instance);
+	phy_type_set(instance);
 
 	return instance->phy;
 }
@@ -1244,6 +1320,10 @@ static int mtk_tphy_probe(struct platform_device *pdev)
 		retval = devm_clk_bulk_get_optional(&phy->dev, TPHY_CLKS_CNT, clks);
 		if (retval)
 			goto put_child;
+
+		retval = phy_type_syscon_get(instance, child_np);
+		if (retval)
+			goto put_child;
 	}
 
 	provider = devm_of_phy_provider_register(dev, mtk_phy_xlate);
-- 
2.18.0


  parent reply	other threads:[~2021-07-28  7:59 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-28  7:58 [PATCH 1/9] dt-bindings: phy: mediatek: tphy: " Chunfeng Yun
2021-07-28  7:58 ` [PATCH 2/9] phy: phy-mtk-tphy: use clock bulk to get clocks Chunfeng Yun
2021-07-28  7:58 ` Chunfeng Yun [this message]
2021-07-28  7:58 ` [PATCH 4/9] phy: phy-mtk-tphy: print error log using child device Chunfeng Yun
2021-07-28  7:58 ` [PATCH 5/9] phy: phy-mtk-tphy: remove error log of ioremap failure Chunfeng Yun
2021-07-28  7:58 ` [PATCH 6/9] phy: phy-mtk-ufs: use clock bulk to get clocks Chunfeng Yun
2021-07-28  7:58 ` [PATCH 7/9] phy: phy-mtk-hdmi: convert to devm_platform_ioremap_resource Chunfeng Yun
2021-07-30 16:23   ` Chun-Kuang Hu
2021-07-28  7:58 ` [PATCH 8/9] phy: phy-mtk-mipi-dsi: remove dummy assignment of error number Chunfeng Yun
2021-07-30 16:24   ` Chun-Kuang Hu
2021-07-28  7:58 ` [PATCH 9/9] phy: phy-mtk-mipi-dsi: convert to devm_platform_ioremap_resource Chunfeng Yun
2021-07-30 16:25   ` Chun-Kuang Hu
2021-08-02 21:33 ` [PATCH 1/9] dt-bindings: phy: mediatek: tphy: support type switch by pericfg Rob Herring

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