[PATCH v1 0/2] phy: exynos5-usbdrd: support the exynos8890 USBDRD

[PATCH v1 0/2] phy: exynos5-usbdrd: support the exynos8890 USBDRD

[Ivaylo Ivanov]

Hey folks,

This patchset adds support for the usbdrd phy for exynos8890. The SoC
features 2 dwc3 controllers and 2 usb phy controllers. One of the USBs
is used for DRD, whereas the second - for host. The host one seems to
only be used on the MV8890 SBC, which... I don't think anyone has,
really.

Code from this patchset can and will be reused for 8895 (I actually based
it on my old 8895 work but decided to upstream it)

Best regards,
Ivaylo

Ivaylo Ivanov (2):
  dt-bindings: phy: samsung,usb3-drd-phy: add exynos8890 support
  phy: exynos5-usbdrd: support the exynos8890 USBDRD controller

 .../bindings/phy/samsung,usb3-drd-phy.yaml    |  25 +++
 drivers/phy/samsung/phy-exynos5-usbdrd.c      | 210 ++++++++++++++++++
 2 files changed, 235 insertions(+)

-- 
2.43.0

[PATCH v1 1/2] dt-bindings: phy: samsung,usb3-drd-phy: add exynos8890 support

[Ivaylo Ivanov]

The exynos8890 SoC features two dwc3 controllers with one USBDRD and
one USBHOST controller. Document compatible for the USBDRD one.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
---
 .../bindings/phy/samsung,usb3-drd-phy.yaml    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
index e90640320..2b1544baf 100644
--- a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
@@ -33,6 +33,7 @@ properties:
       - samsung,exynos7-usbdrd-phy
       - samsung,exynos7870-usbdrd-phy
       - samsung,exynos850-usbdrd-phy
+      - samsung,exynos8890-usbdrd-phy
       - samsung,exynos990-usbdrd-phy
 
   clocks:
@@ -209,6 +210,30 @@ allOf:
         reg-names:
           maxItems: 1
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynos8890-usbdrd-phy
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+
+        clock-names:
+          items:
+            - const: phy
+            - const: ref
+            - const: pipe
+
+        reg:
+          maxItems: 1
+
+        reg-names:
+          maxItems: 1
+
   - if:
       properties:
         compatible:
-- 
2.43.0

[PATCH v1 1/2] dt-bindings: usb: samsung,exynos-dwc3 add exynos8890 compatible

[Ivaylo Ivanov]

Add a compatible for the exynos8890-dwusb3 node. It features the same
clocks and regulators as exynos7, so reuse its compatible.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
---
 Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml b/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml
index 6d39e5066..6ecbf53d8 100644
--- a/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml
@@ -21,6 +21,9 @@ properties:
           - samsung,exynos7870-dwusb3
           - samsung,exynos850-dwusb3
           - samsung,exynosautov920-dwusb3
+      - items:
+          - const: samsung,exynos8890-dwusb3
+          - const: samsung,exynos7-dwusb3
       - items:
           - const: samsung,exynos990-dwusb3
           - const: samsung,exynos850-dwusb3
-- 
2.43.0

Re: [PATCH v1 1/2] dt-bindings: usb: samsung,exynos-dwc3 add exynos8890 compatible

[Rob Herring (Arm)]

On Sun, 14 Sep 2025 17:17:43 +0300, Ivaylo Ivanov wrote:
> Add a compatible for the exynos8890-dwusb3 node. It features the same
> clocks and regulators as exynos7, so reuse its compatible.
> 
> Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
> ---
>  Documentation/devicetree/bindings/usb/samsung,exynos-dwc3.yaml | 3 +++
>  1 file changed, 3 insertions(+)
> 

Acked-by: Rob Herring (Arm) <robh@kernel.org>

[PATCH v1 2/2] dt-bindings: phy: samsung,usb3-drd-phy: add exynos8890 support

[Ivaylo Ivanov]

The exynos8890 SoC features two dwc3 controllers with one USBDRD and
one USBHOST controller. Document compatible for the USBDRD one.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
---
 .../bindings/phy/samsung,usb3-drd-phy.yaml    | 25 +++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
index e90640320..2b1544baf 100644
--- a/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/samsung,usb3-drd-phy.yaml
@@ -33,6 +33,7 @@ properties:
       - samsung,exynos7-usbdrd-phy
       - samsung,exynos7870-usbdrd-phy
       - samsung,exynos850-usbdrd-phy
+      - samsung,exynos8890-usbdrd-phy
       - samsung,exynos990-usbdrd-phy
 
   clocks:
@@ -209,6 +210,30 @@ allOf:
         reg-names:
           maxItems: 1
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - samsung,exynos8890-usbdrd-phy
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          maxItems: 3
+
+        clock-names:
+          items:
+            - const: phy
+            - const: ref
+            - const: pipe
+
+        reg:
+          maxItems: 1
+
+        reg-names:
+          maxItems: 1
+
   - if:
       properties:
         compatible:
-- 
2.43.0

[PATCH v1 2/2] phy: exynos5-usbdrd: support the exynos8890 USBDRD controller

[Ivaylo Ivanov]

The exynos8890 USBDRD controller integrates a combined usb phy that
supports UTMI and PIPE3 interfaces. Add the required changes for USB HS
to work. USB SS is out of the scope, as the Samsung Galaxy S7 only has
a microusb 2.0 port.

Signed-off-by: Ivaylo Ivanov <ivo.ivanov.ivanov1@gmail.com>
---
 drivers/phy/samsung/phy-exynos5-usbdrd.c | 210 +++++++++++++++++++++++
 1 file changed, 210 insertions(+)

diff --git a/drivers/phy/samsung/phy-exynos5-usbdrd.c b/drivers/phy/samsung/phy-exynos5-usbdrd.c
index dd660ebe8..546c69442 100644
--- a/drivers/phy/samsung/phy-exynos5-usbdrd.c
+++ b/drivers/phy/samsung/phy-exynos5-usbdrd.c
@@ -145,6 +145,7 @@
 #define PHYUTMICLKSEL_UTMI_CLKSEL		BIT(2)
 
 #define EXYNOS5_DRD_PHYRESUME			0x34
+#define PHYRESUME_FORCE_QACT			BIT(9)
 
 #define EXYNOS5_DRD_LINKPORT			0x44
 #define LINKPORT_HOST_U3_PORT_DISABLE		BIT(8)
@@ -1302,6 +1303,158 @@ static const struct phy_ops exynos7870_usbdrd_phy_ops = {
 	.owner		= THIS_MODULE,
 };
 
+static unsigned int
+exynos8890_usbdrd_utmi_set_refclk(struct phy_usb_instance *inst)
+{
+	u32 reg;
+	struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
+
+	/* restore any previous reference clock settings */
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
+
+	reg &= ~PHYCLKRST_REFCLKSEL;
+	reg |= FIELD_PREP(PHYCLKRST_REFCLKSEL, PHYCLKRST_REFCLKSEL_PAD_REFCLK);
+
+	reg &= ~(PHYCLKRST_FSEL_UTMI |
+		 PHYCLKRST_FSEL_PIPE |
+		 PHYCLKRST_MPLL_MULTIPLIER |
+		 PHYCLKRST_SSC_REFCLKSEL);
+	reg |= FIELD_PREP(PHYCLKRST_FSEL_UTMI, phy_drd->extrefclk);
+
+	if (phy_drd->extrefclk == EXYNOS5_FSEL_26MHZ)
+		reg |= FIELD_PREP(PHYCLKRST_MPLL_MULTIPLIER, 0x60);
+
+	return reg;
+}
+
+static void exynos8890_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
+{
+	u32 reg;
+
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
+	reg |= PHYCLKRST_EN_UTMISUSPEND;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
+
+	/* UTMI Power Control */
+	writel(PHYUTMI_OTGDISABLE, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI);
+
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
+	reg &= ~PHYTEST_POWERDOWN_HSP;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
+}
+
+static int exynos8890_usbdrd_phy_init(struct phy *phy)
+{
+	int ret;
+	u32 reg;
+	struct phy_usb_instance *inst = phy_get_drvdata(phy);
+	struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
+
+	ret = clk_bulk_prepare_enable(phy_drd->drv_data->n_clks, phy_drd->clks);
+	if (ret)
+		return ret;
+
+	/* Reset USB 3.0 PHY */
+	writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
+	writel(0x0, phy_drd->reg_phy + EXYNOS5_DRD_PHYRESUME);
+
+	/*
+	 * Setting the Frame length Adj value[6:1] to default 0x20
+	 * See xHCI 1.0 spec, 5.2.4
+	 */
+	reg =	LINKSYSTEM_XHCI_VERSION_CONTROL |
+		FIELD_PREP(LINKSYSTEM_FLADJ, 0x20);
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_LINKSYSTEM);
+
+	/*
+	 * Disable HWACG (hardware auto clock gating control). This will force
+	 * QACTIVE signal in Q-Channel interface to HIGH level, to make sure
+	 * the PHY clock is not gated by the hardware.
+	 */
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYRESUME);
+	reg |= PHYRESUME_FORCE_QACT;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYRESUME);
+
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
+	/* Select PHY CLK source */
+	reg &= ~PHYPARAM0_REF_USE_PAD;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYPARAM0);
+
+	/* UTMI or PIPE3 specific init */
+	inst->phy_cfg->phy_init(phy_drd);
+
+	/* reference clock settings */
+	reg = inst->phy_cfg->set_refclk(inst);
+
+		/* Digital power supply in normal operating mode */
+	reg |=	PHYCLKRST_RETENABLEN |
+		/* Enable ref clock for SS function */
+		PHYCLKRST_REF_SSP_EN |
+		/* Enable spread spectrum */
+		PHYCLKRST_SSC_EN |
+		/* Power down HS Bias and PLL blocks in suspend mode */
+		PHYCLKRST_COMMONONN |
+		/* Reset the port */
+		PHYCLKRST_PORTRESET;
+
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
+
+	fsleep(10);
+
+	reg &= ~PHYCLKRST_PORTRESET;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
+
+	/* Configure OVC IO usage */
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_LINKPORT);
+	reg |= LINKPORT_HOST_PORT_OVCR_U3_SEL | LINKPORT_HOST_PORT_OVCR_U2_SEL;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_LINKPORT);
+
+	clk_bulk_disable_unprepare(phy_drd->drv_data->n_clks, phy_drd->clks);
+
+	return 0;
+}
+
+static int exynos8890_usbdrd_phy_exit(struct phy *phy)
+{
+	int ret;
+	u32 reg;
+	struct phy_usb_instance *inst = phy_get_drvdata(phy);
+	struct exynos5_usbdrd_phy *phy_drd = to_usbdrd_phy(inst);
+
+	ret = clk_bulk_prepare_enable(phy_drd->drv_data->n_clks, phy_drd->clks);
+	if (ret)
+		return ret;
+
+	reg =	PHYUTMI_OTGDISABLE |
+		PHYUTMI_FORCESUSPEND |
+		PHYUTMI_FORCESLEEP;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYUTMI);
+
+	/* Resetting the PHYCLKRST enable bits to reduce leakage current */
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
+	reg &= ~(PHYCLKRST_REF_SSP_EN |
+		 PHYCLKRST_SSC_EN |
+		 PHYCLKRST_COMMONONN);
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYCLKRST);
+
+	/* Control PHYTEST to remove leakage current */
+	reg = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
+	reg |= PHYTEST_POWERDOWN_SSP | PHYTEST_POWERDOWN_HSP;
+	writel(reg, phy_drd->reg_phy + EXYNOS5_DRD_PHYTEST);
+
+	clk_bulk_disable_unprepare(phy_drd->drv_data->n_clks, phy_drd->clks);
+
+	return 0;
+}
+
+static const struct phy_ops exynos8890_usbdrd_phy_ops = {
+	.init		= exynos8890_usbdrd_phy_init,
+	.exit		= exynos8890_usbdrd_phy_exit,
+	.power_on	= exynos5_usbdrd_phy_power_on,
+	.power_off	= exynos5_usbdrd_phy_power_off,
+	.owner		= THIS_MODULE,
+};
+
 static void exynos2200_usbdrd_utmi_init(struct exynos5_usbdrd_phy *phy_drd)
 {
 	/* Configure non-Samsung IP PHY, responsible for UTMI */
@@ -1897,6 +2050,15 @@ static const struct exynos5_usbdrd_phy_config phy_cfg_exynos850[] = {
 	},
 };
 
+static const struct exynos5_usbdrd_phy_config phy_cfg_exynos8890[] = {
+	{
+		.id = EXYNOS5_DRDPHY_UTMI,
+		.phy_isol = exynos5_usbdrd_phy_isol,
+		.phy_init = exynos8890_usbdrd_utmi_init,
+		.set_refclk = exynos8890_usbdrd_utmi_set_refclk,
+	},
+};
+
 static
 const struct exynos5_usbdrd_phy_tuning exynos7870_tunes_utmi_postinit[] = {
 	PHY_TUNING_ENTRY_PHY(EXYNOS5_DRD_PHYPARAM0,
@@ -2025,6 +2187,51 @@ static const struct exynos5_usbdrd_phy_drvdata exynos850_usbdrd_phy = {
 	.n_regulators		= ARRAY_SIZE(exynos5_regulator_names),
 };
 
+static const char * const exynos8890_core_clk_names[] = {
+	"ref",
+};
+
+static const char * const exynos8890_clk_names[] = {
+	"phy", "pipe",
+};
+
+static
+const struct exynos5_usbdrd_phy_tuning exynos8890_tunes_utmi_postinit[] = {
+	PHY_TUNING_ENTRY_PHY(EXYNOS5_DRD_PHYPARAM0,
+			     (PHYPARAM0_TXVREFTUNE | PHYPARAM0_TXRISETUNE |
+			      PHYPARAM0_TXRESTUNE | PHYPARAM0_TXPREEMPPULSETUNE |
+			      PHYPARAM0_TXPREEMPAMPTUNE | PHYPARAM0_TXHSXVTUNE |
+			      PHYPARAM0_TXFSLSTUNE | PHYPARAM0_SQRXTUNE |
+			      PHYPARAM0_OTGTUNE | PHYPARAM0_COMPDISTUNE),
+			     (FIELD_PREP_CONST(PHYPARAM0_TXVREFTUNE, 11) |
+			      FIELD_PREP_CONST(PHYPARAM0_TXRISETUNE, 3) |
+			      FIELD_PREP_CONST(PHYPARAM0_TXRESTUNE, 2) |
+			      FIELD_PREP_CONST(PHYPARAM0_TXPREEMPAMPTUNE, 3) |
+			      FIELD_PREP_CONST(PHYPARAM0_TXHSXVTUNE, 0) |
+			      FIELD_PREP_CONST(PHYPARAM0_TXFSLSTUNE, 3) |
+			      FIELD_PREP_CONST(PHYPARAM0_SQRXTUNE, 7) |
+			      FIELD_PREP_CONST(PHYPARAM0_OTGTUNE, 4) |
+			      FIELD_PREP_CONST(PHYPARAM0_COMPDISTUNE, 0))),
+	PHY_TUNING_ENTRY_LAST
+};
+
+static const struct exynos5_usbdrd_phy_tuning *exynos8890_tunes[PTS_MAX] = {
+	[PTS_UTMI_POSTINIT] = exynos8890_tunes_utmi_postinit,
+};
+
+static const struct exynos5_usbdrd_phy_drvdata exynos8890_usbdrd_phy = {
+	.phy_cfg		= phy_cfg_exynos8890,
+	.phy_tunes		= exynos8890_tunes,
+	.phy_ops		= &exynos8890_usbdrd_phy_ops,
+	.pmu_offset_usbdrd0_phy	= EXYNOS5_USBDRD_PHY_CONTROL,
+	.clk_names		= exynos8890_clk_names,
+	.n_clks			= ARRAY_SIZE(exynos8890_clk_names),
+	.core_clk_names		= exynos8890_core_clk_names,
+	.n_core_clks		= ARRAY_SIZE(exynos8890_core_clk_names),
+	.regulator_names	= exynos5_regulator_names,
+	.n_regulators		= ARRAY_SIZE(exynos5_regulator_names),
+};
+
 static const struct exynos5_usbdrd_phy_tuning exynos990_tunes_utmi_postinit[] = {
 	PHY_TUNING_ENTRY_PHY(EXYNOS850_DRD_HSPPARACON,
 			     (HSPPARACON_TXVREF |
@@ -2257,6 +2464,9 @@ static const struct of_device_id exynos5_usbdrd_phy_of_match[] = {
 	}, {
 		.compatible = "samsung,exynos850-usbdrd-phy",
 		.data = &exynos850_usbdrd_phy
+	}, {
+		.compatible = "samsung,exynos8890-usbdrd-phy",
+		.data = &exynos8890_usbdrd_phy
 	}, {
 		.compatible = "samsung,exynos990-usbdrd-phy",
 		.data = &exynos990_usbdrd_phy
-- 
2.43.0