[PATCH v2 0/3] Add support for multiport controller

[PATCH v2 0/3] Add support for multiport controller

[Harsh Agarwal]

Currently the DWC3 driver supports only single port controller which 
requires at most two PHYs ie HS and SS PHYs. There are SoCs that has
DWC3 controller with multiple ports that can operate in host mode. Some of
the port supports both SS+HS and other port supports only HS mode.

This change refactors the PHY logic to support multiport controller. The 
implementation has been tested with Generic PHYs as well.

For any multiport controller we would define a new node "multiport" inside
dwc3 and then add subsequent "mport" nodes inside it for individual ports
that it supports. Now each individual "mport" node defines their own PHYs.

e.g.
Consider a Dual port controller where each port supports HS+SS 

multiport {
	mp_1: mport1 {
		usb-phy = <usb2_phy0>, <usb3_phy0>;
        /* Can define Generic PHYs also */  
	};	
	mp_2: mport2 {
		usb-phy = <usb2_phy1>, <usb3_phy1>;
	};	

Changes in v2:
Changed dwc3_count_phys to return the number of PHY Phandles in the node.
This will be used now in dwc3_extract_num_phys to increment num_usb2_phy 
and num_usb3_phy.
Added new parameter "ss_idx" in dwc3_core_get_phy_ny_node and changed its
structure such that the first half is for HS-PHY and second half is for
SS-PHY.
In dwc3_core_get_phy, for multiport controller, only if SS-PHY phandle is
present, pass proper SS_IDX else pass -1.

Harsh Agarwal (3):
  dt-bindings: usb: dwc3: Add support for multiport related properties
  usb: phy: Add devm_of_usb_get_phy_by_phandle
  usb: dwc3: Refactor PHY logic to support Multiport Controller

 .../devicetree/bindings/usb/snps,dwc3.yaml         |  55 +++
 drivers/usb/dwc3/core.c                            | 403 +++++++++++++++------
 drivers/usb/dwc3/core.h                            |  12 +-
 drivers/usb/dwc3/drd.c                             |  16 +-
 drivers/usb/dwc3/gadget.c                          |   4 +-
 drivers/usb/phy/phy.c                              |  34 ++
 include/linux/usb/phy.h                            |   8 +
 7 files changed, 402 insertions(+), 130 deletions(-)

-- 
2.7.4

[PATCH v2 1/3] dt-bindings: usb: dwc3: Add support for multiport related properties

[Harsh Agarwal]

Added support for multiport, mport, num_usb2_phy and num_usb3_phy
properties. These properties are used to support devices having
a multiport controller.

Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
---
 .../devicetree/bindings/usb/snps,dwc3.yaml         | 55 ++++++++++++++++++++++
 1 file changed, 55 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index d41265b..fdf3655 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -343,6 +343,34 @@ properties:
       This port is used with the 'usb-role-switch' property  to connect the
       dwc3 to type C connector.
 
+  multiport:
+    description:
+      If a single USB controller supports multiple ports, then it's referred to as
+      a multiport controller. Each port of the multiport controller can support
+      either High Speed or Super Speed or both and have their own PHY phandles. Each
+      port is represented by "mport" node and all the "mport" nodes are grouped
+      together inside the "multiport" node where individual "mport" node defines the
+      PHYs supported by that port.
+    required:
+      - mport
+
+  num_usb2_phy:
+    description: Total number of HS-PHYs defined by the multiport controller.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  num_usb3_phy:
+    description: Total number of SS-PHYs defined by the multiport controller.
+    $ref: /schemas/types.yaml#/definitions/uint32
+
+  mport:
+    description: Each mport node represents one port of the multiport controller.
+    oneOf:
+       - required:
+         - usb-phy
+       - required:
+          - phys
+          - phy-names
+
 unevaluatedProperties: false
 
 required:
@@ -371,4 +399,31 @@ examples:
       snps,dis_u2_susphy_quirk;
       snps,dis_enblslpm_quirk;
     };
+  - |
+    usb@4a000000 {
+      compatible = "snps,dwc3";
+      reg = <0x4a000000 0xcfff>;
+      interrupts = <0 92 4>;
+
+      multiport {
+
+        MP_1: mport1 {
+          usb-phy = <&usb2_phy0>, <&usb3_phy0>;
+          /* Can define Generic PHYs also */
+        };
+
+        MP_2: mport2 {
+          usb-phy = <&usb2_phy1>, <&usb3_phy1>;
+        };
+
+        MP_3: mport3 {
+          usb-phy = <&usb2_phy2>;
+        };
+
+        MP_4: mport4 {
+          usb-phy = <&usb2_phy3>;
+        };
+
+      };
+    };
 ...
-- 
2.7.4

[PATCH v2 2/3] usb: phy: Add devm_of_usb_get_phy_by_phandle

[Harsh Agarwal]

Adding support for devm_of_usb_get_phy_by_phandle which allows
us to get PHY phandles of a device declared inside lookup_node.

Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
---
 drivers/usb/phy/phy.c   | 34 ++++++++++++++++++++++++++++++++++
 include/linux/usb/phy.h |  8 ++++++++
 2 files changed, 42 insertions(+)

diff --git a/drivers/usb/phy/phy.c b/drivers/usb/phy/phy.c
index 1b24492..0843757 100644
--- a/drivers/usb/phy/phy.c
+++ b/drivers/usb/phy/phy.c
@@ -615,6 +615,40 @@ struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
 EXPORT_SYMBOL_GPL(devm_usb_get_phy_by_phandle);
 
 /**
+ * devm_of_usb_get_phy_by_phandle - find the USB PHY by phandle in lookup_node
+ * @dev: device that requests this phy
+ * @phandle: name of the property holding the phy phandle value
+ * @index: the index of the phy
+ * @lookup_node: The node to search for PHY phandles.
+ *
+ * Returns the phy driver associated with the given phandle value,
+ * after getting a refcount to it, -ENODEV if there is no such phy or
+ * -EPROBE_DEFER if there is a phandle to the phy, but the device is
+ * not yet loaded. While at that, it also associates the device with
+ * the phy using devres. On driver detach, release function is invoked
+ * on the devres data, then, devres data is freed.
+ *
+ * For use by USB host and peripheral drivers.
+ */
+struct usb_phy *devm_of_usb_get_phy_by_phandle(struct device *dev,
+	const char *phandle, u8 index, struct device_node *lookup_node)
+{
+	struct device_node *node;
+	struct usb_phy	*phy;
+
+	node = of_parse_phandle(lookup_node, phandle, index);
+	if (!node) {
+		dev_dbg(dev, "failed to get %s phandle in %pOF node\n", phandle,
+			dev->of_node);
+		return ERR_PTR(-ENODEV);
+	}
+	phy = devm_usb_get_phy_by_node(dev, node, NULL);
+	of_node_put(node);
+	return phy;
+}
+EXPORT_SYMBOL_GPL(devm_of_usb_get_phy_by_phandle);
+
+/**
  * devm_usb_put_phy - release the USB PHY
  * @dev: device that wants to release this phy
  * @phy: the phy returned by devm_usb_get_phy()
diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
index e4de6bc..2581c72 100644
--- a/include/linux/usb/phy.h
+++ b/include/linux/usb/phy.h
@@ -220,6 +220,8 @@ extern struct usb_phy *devm_usb_get_phy(struct device *dev,
 	enum usb_phy_type type);
 extern struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
 	const char *phandle, u8 index);
+extern struct usb_phy *devm_of_usb_get_phy_by_phandle(struct device *dev,
+	const char *phandle, u8 index, struct device_node *lookup_node);
 extern struct usb_phy *devm_usb_get_phy_by_node(struct device *dev,
 	struct device_node *node, struct notifier_block *nb);
 extern void usb_put_phy(struct usb_phy *);
@@ -249,6 +251,12 @@ static inline struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
 	return ERR_PTR(-ENXIO);
 }
 
+extern inline struct usb_phy *devm_of_usb_get_phy_by_phandle(struct device *dev,
+	const char *phandle, u8 index, struct device_node *lookup_node)
+{
+	return ERR_PTR(-ENXIO);
+}
+
 static inline struct usb_phy *devm_usb_get_phy_by_node(struct device *dev,
 	struct device_node *node, struct notifier_block *nb)
 {
-- 
2.7.4

[PATCH v2 3/3] usb: dwc3: Refactor PHY logic to support Multiport Controller

[Harsh Agarwal]

Currently the DWC3 driver supports only single port controller
which requires at most 2 PHYs ie HS and SS PHYs.

But some SOCs have a "multiport" USB DWC3 controller where a
single controller supports multiple ports and each port have
their own PHYs. Refactor PHY logic to support the same.

Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
---
 drivers/usb/dwc3/core.c   | 403 +++++++++++++++++++++++++++++++++-------------
 drivers/usb/dwc3/core.h   |  12 +-
 drivers/usb/dwc3/drd.c    |  16 +-
 drivers/usb/dwc3/gadget.c |   4 +-
 4 files changed, 305 insertions(+), 130 deletions(-)

diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 5734219..be43719 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -120,7 +120,7 @@ static void __dwc3_set_mode(struct work_struct *work)
 {
 	struct dwc3 *dwc = work_to_dwc(work);
 	unsigned long flags;
-	int ret;
+	int i, ret;
 	u32 reg;
 
 	mutex_lock(&dwc->mutex);
@@ -189,10 +189,13 @@ static void __dwc3_set_mode(struct work_struct *work)
 		if (ret) {
 			dev_err(dwc->dev, "failed to initialize host\n");
 		} else {
-			if (dwc->usb2_phy)
-				otg_set_vbus(dwc->usb2_phy->otg, true);
-			phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
-			phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
+			for (i = 0; i < dwc->num_usb2_phy; i++) {
+				if (dwc->usb2_phy[i])
+					otg_set_vbus(dwc->usb2_phy[i]->otg, true);
+				phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
+			}
+			for (i = 0; i < dwc->num_usb3_phy; i++)
+				phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
 			if (dwc->dis_split_quirk) {
 				reg = dwc3_readl(dwc->regs, DWC3_GUCTL3);
 				reg |= DWC3_GUCTL3_SPLITDISABLE;
@@ -205,10 +208,10 @@ static void __dwc3_set_mode(struct work_struct *work)
 
 		dwc3_event_buffers_setup(dwc);
 
-		if (dwc->usb2_phy)
-			otg_set_vbus(dwc->usb2_phy->otg, false);
-		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
-		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
+		if (dwc->usb2_phy[0])
+			otg_set_vbus(dwc->usb2_phy[0]->otg, false);
+		phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
 
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
@@ -656,6 +659,7 @@ static int dwc3_core_ulpi_init(struct dwc3 *dwc)
  */
 static int dwc3_phy_setup(struct dwc3 *dwc)
 {
+	int i;
 	unsigned int hw_mode;
 	u32 reg;
 
@@ -716,7 +720,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 	if (dwc->dis_del_phy_power_chg_quirk)
 		reg &= ~DWC3_GUSB3PIPECTL_DEPOCHANGE;
 
-	dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+	for (i = 0; i < dwc->num_usb3_phy; i++)
+		dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
 
 	reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
 
@@ -730,7 +735,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 		} else if (dwc->hsphy_interface &&
 				!strncmp(dwc->hsphy_interface, "ulpi", 4)) {
 			reg |= DWC3_GUSB2PHYCFG_ULPI_UTMI;
-			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+			for (i = 0; i < dwc->num_usb2_phy; i++)
+				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
 		} else {
 			/* Relying on default value. */
 			if (!(reg & DWC3_GUSB2PHYCFG_ULPI_UTMI))
@@ -787,7 +793,8 @@ static int dwc3_phy_setup(struct dwc3 *dwc)
 	if (dwc->dis_u2_freeclk_exists_quirk)
 		reg &= ~DWC3_GUSB2PHYCFG_U2_FREECLK_EXISTS;
 
-	dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+	for (i = 0; i < dwc->num_usb2_phy; i++)
+		dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
 
 	return 0;
 }
@@ -826,17 +833,23 @@ static void dwc3_clk_disable(struct dwc3 *dwc)
 
 static void dwc3_core_exit(struct dwc3 *dwc)
 {
+	int i;
 	dwc3_event_buffers_cleanup(dwc);
 
-	usb_phy_shutdown(dwc->usb2_phy);
-	usb_phy_shutdown(dwc->usb3_phy);
-	phy_exit(dwc->usb2_generic_phy);
-	phy_exit(dwc->usb3_generic_phy);
+	for (i = 0; i < dwc->num_usb2_phy; i++) {
+		usb_phy_shutdown(dwc->usb2_phy[i]);
+		usb_phy_set_suspend(dwc->usb2_phy[i], 1);
+		phy_exit(dwc->usb2_generic_phy[i]);
+		phy_power_off(dwc->usb2_generic_phy[i]);
+	}
+
+	for (i = 0; i < dwc->num_usb3_phy; i++) {
+		usb_phy_shutdown(dwc->usb3_phy[i]);
+		usb_phy_set_suspend(dwc->usb3_phy[i], 1);
+		phy_exit(dwc->usb3_generic_phy[i]);
+		phy_power_off(dwc->usb3_generic_phy[i]);
+	}
 
-	usb_phy_set_suspend(dwc->usb2_phy, 1);
-	usb_phy_set_suspend(dwc->usb3_phy, 1);
-	phy_power_off(dwc->usb2_generic_phy);
-	phy_power_off(dwc->usb3_generic_phy);
 	dwc3_clk_disable(dwc);
 	reset_control_assert(dwc->reset);
 }
@@ -1039,7 +1052,7 @@ static int dwc3_core_init(struct dwc3 *dwc)
 {
 	unsigned int		hw_mode;
 	u32			reg;
-	int			ret;
+	int			ret, i;
 
 	hw_mode = DWC3_GHWPARAMS0_MODE(dwc->hwparams.hwparams0);
 
@@ -1067,16 +1080,24 @@ static int dwc3_core_init(struct dwc3 *dwc)
 		dwc->phys_ready = true;
 	}
 
-	usb_phy_init(dwc->usb2_phy);
-	usb_phy_init(dwc->usb3_phy);
-	ret = phy_init(dwc->usb2_generic_phy);
-	if (ret < 0)
-		goto err0a;
+	for (i = 0; i < dwc->num_usb2_phy; i++)
+		usb_phy_init(dwc->usb2_phy[i]);
+	for (i = 0; i < dwc->num_usb3_phy; i++)
+		usb_phy_init(dwc->usb3_phy[i]);
 
-	ret = phy_init(dwc->usb3_generic_phy);
-	if (ret < 0) {
-		phy_exit(dwc->usb2_generic_phy);
-		goto err0a;
+	for (i = 0; i < dwc->num_usb2_phy; i++) {
+		ret = phy_init(dwc->usb2_generic_phy[i]);
+		if (ret < 0)
+			goto err0a;
+	}
+
+	for (i = 0; i < dwc->num_usb3_phy; i++) {
+		ret = phy_init(dwc->usb3_generic_phy[i]);
+		if (ret < 0) {
+			for (i = 0; i < dwc->num_usb2_phy; i++)
+				phy_exit(dwc->usb2_generic_phy[i]);
+			goto err0a;
+		}
 	}
 
 	ret = dwc3_core_soft_reset(dwc);
@@ -1086,15 +1107,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	if (hw_mode == DWC3_GHWPARAMS0_MODE_DRD &&
 	    !DWC3_VER_IS_WITHIN(DWC3, ANY, 194A)) {
 		if (!dwc->dis_u3_susphy_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(0));
-			reg |= DWC3_GUSB3PIPECTL_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(0), reg);
+			for (i = 0; i < dwc->num_usb3_phy; i++) {
+				reg = dwc3_readl(dwc->regs, DWC3_GUSB3PIPECTL(i));
+				reg |= DWC3_GUSB3PIPECTL_SUSPHY;
+				dwc3_writel(dwc->regs, DWC3_GUSB3PIPECTL(i), reg);
+			}
 		}
 
 		if (!dwc->dis_u2_susphy_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-			reg |= DWC3_GUSB2PHYCFG_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+			for (i = 0; i < dwc->num_usb2_phy; i++) {
+				reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
+				reg |= DWC3_GUSB2PHYCFG_SUSPHY;
+				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
+			}
 		}
 	}
 
@@ -1113,15 +1138,19 @@ static int dwc3_core_init(struct dwc3 *dwc)
 
 	dwc3_set_incr_burst_type(dwc);
 
-	usb_phy_set_suspend(dwc->usb2_phy, 0);
-	usb_phy_set_suspend(dwc->usb3_phy, 0);
-	ret = phy_power_on(dwc->usb2_generic_phy);
-	if (ret < 0)
-		goto err2;
+	for (i = 0; i < dwc->num_usb2_phy; i++) {
+		usb_phy_set_suspend(dwc->usb2_phy[i], 0);
+		ret = phy_power_on(dwc->usb2_generic_phy[i]);
+		if (ret < 0)
+			goto err2;
+	}
 
-	ret = phy_power_on(dwc->usb3_generic_phy);
-	if (ret < 0)
-		goto err3;
+	for (i = 0; i < dwc->num_usb3_phy; i++) {
+		usb_phy_set_suspend(dwc->usb3_phy[i], 0);
+		ret = phy_power_on(dwc->usb3_generic_phy[i]);
+		if (ret < 0)
+			goto err3;
+	}
 
 	ret = dwc3_event_buffers_setup(dwc);
 	if (ret) {
@@ -1229,20 +1258,29 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	return 0;
 
 err4:
-	phy_power_off(dwc->usb3_generic_phy);
+	for (i = 0; i < dwc->num_usb3_phy; i++)
+		phy_power_off(dwc->usb3_generic_phy[i]);
 
 err3:
-	phy_power_off(dwc->usb2_generic_phy);
+	for (i = 0; i < dwc->num_usb2_phy; i++)
+		phy_power_off(dwc->usb2_generic_phy[i]);
 
 err2:
-	usb_phy_set_suspend(dwc->usb2_phy, 1);
-	usb_phy_set_suspend(dwc->usb3_phy, 1);
+	for (i = 0; i < dwc->num_usb2_phy; i++)
+		usb_phy_set_suspend(dwc->usb2_phy[i], 1);
+	for (i = 0; i < dwc->num_usb3_phy; i++)
+		usb_phy_set_suspend(dwc->usb3_phy[i], 1);
 
 err1:
-	usb_phy_shutdown(dwc->usb2_phy);
-	usb_phy_shutdown(dwc->usb3_phy);
-	phy_exit(dwc->usb2_generic_phy);
-	phy_exit(dwc->usb3_generic_phy);
+	for (i = 0; i < dwc->num_usb2_phy; i++) {
+		usb_phy_shutdown(dwc->usb2_phy[i]);
+		phy_exit(dwc->usb2_generic_phy[i]);
+	}
+
+	for (i = 0; i < dwc->num_usb3_phy; i++) {
+		usb_phy_shutdown(dwc->usb3_phy[i]);
+		phy_exit(dwc->usb3_generic_phy[i]);
+	}
 
 err0a:
 	dwc3_ulpi_exit(dwc);
@@ -1251,53 +1289,169 @@ static int dwc3_core_init(struct dwc3 *dwc)
 	return ret;
 }
 
-static int dwc3_core_get_phy(struct dwc3 *dwc)
+static int dwc3_count_phys(struct dwc3 *dwc, struct device_node *lookup_node)
+{
+	int count;
+
+	count = of_count_phandle_with_args(lookup_node, "phys", NULL);
+
+	if (count == -ENOENT)
+		count = of_count_phandle_with_args(lookup_node, "usb-phy", NULL);
+
+	return count;
+}
+
+static int dwc3_extract_num_phys(struct dwc3 *dwc)
+{
+	struct device_node	*ports, *port;
+	int			ret;
+
+	/* Find if any "multiport" child is present inside DWC3 */
+	for_each_available_child_of_node(dwc->dev->of_node, ports) {
+		if (!strcmp(ports->name, "multiport"))
+			break;
+	}
+	if (!ports) {
+		dwc->num_usb2_phy = 1;
+		dwc->num_usb3_phy = 1;
+	} else {
+		for_each_available_child_of_node(ports, port) {
+			ret  = dwc3_count_phys(dwc, port);
+			if (ret == 1) {
+				dwc->num_usb2_phy++;
+			} else if (ret == 2) {
+				dwc->num_usb2_phy++;
+				dwc->num_usb3_phy++;
+			} else {
+				of_node_put(port);
+				return ret;
+			}
+		}
+	}
+	dev_info(dwc->dev, "Num of HS and SS PHY are %u %u\n", dwc->num_usb2_phy,
+									dwc->num_usb3_phy);
+
+	dwc->usb2_phy = devm_kzalloc(dwc->dev,
+		sizeof(*dwc->usb2_phy) * dwc->num_usb2_phy, GFP_KERNEL);
+	if (!dwc->usb2_phy)
+		return -ENOMEM;
+
+	dwc->usb3_phy = devm_kzalloc(dwc->dev,
+		sizeof(*dwc->usb3_phy) * dwc->num_usb3_phy, GFP_KERNEL);
+	if (!dwc->usb3_phy)
+		return -ENOMEM;
+
+	dwc->usb2_generic_phy = devm_kzalloc(dwc->dev,
+		sizeof(*dwc->usb2_generic_phy) * dwc->num_usb2_phy, GFP_KERNEL);
+	if (!dwc->usb2_generic_phy)
+		return -ENOMEM;
+
+	dwc->usb3_generic_phy = devm_kzalloc(dwc->dev,
+		sizeof(*dwc->usb3_generic_phy) * dwc->num_usb3_phy, GFP_KERNEL);
+	if (!dwc->usb3_generic_phy)
+		return -ENOMEM;
+
+	return 0;
+}
+
+static int dwc3_core_get_phy_by_node(struct dwc3 *dwc,
+		struct device_node *lookup_node, int i, int ss_idx)
 {
 	struct device		*dev = dwc->dev;
-	struct device_node	*node = dev->of_node;
-	int ret;
+	int			ret;
 
-	if (node) {
-		dwc->usb2_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 0);
-		dwc->usb3_phy = devm_usb_get_phy_by_phandle(dev, "usb-phy", 1);
+	if (lookup_node) {
+		dwc->usb2_phy[i] = devm_of_usb_get_phy_by_phandle(dev,
+								"usb-phy", 0, lookup_node);
 	} else {
-		dwc->usb2_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
-		dwc->usb3_phy = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
+		dwc->usb2_phy[i] = devm_usb_get_phy(dev, USB_PHY_TYPE_USB2);
 	}
 
-	if (IS_ERR(dwc->usb2_phy)) {
-		ret = PTR_ERR(dwc->usb2_phy);
+	if (IS_ERR(dwc->usb2_phy[i])) {
+		ret = PTR_ERR(dwc->usb2_phy[i]);
 		if (ret == -ENXIO || ret == -ENODEV)
-			dwc->usb2_phy = NULL;
+			dwc->usb2_phy[i] = NULL;
 		else
 			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
 	}
 
-	if (IS_ERR(dwc->usb3_phy)) {
-		ret = PTR_ERR(dwc->usb3_phy);
-		if (ret == -ENXIO || ret == -ENODEV)
-			dwc->usb3_phy = NULL;
+	dwc->usb2_generic_phy[i] = devm_of_phy_get(dev, lookup_node, "usb2-phy");
+	if (IS_ERR(dwc->usb2_generic_phy[i])) {
+		ret = PTR_ERR(dwc->usb2_generic_phy[i]);
+		if (ret == -ENODEV)
+			dwc->usb2_generic_phy[i] = NULL;
 		else
-			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
+			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
 	}
 
-	dwc->usb2_generic_phy = devm_phy_get(dev, "usb2-phy");
-	if (IS_ERR(dwc->usb2_generic_phy)) {
-		ret = PTR_ERR(dwc->usb2_generic_phy);
-		if (ret == -ENOSYS || ret == -ENODEV)
-			dwc->usb2_generic_phy = NULL;
+	/* If SS-PHY not present in this lookup-node, then return */
+	if (ss_idx == -1)
+		return 0;
+
+	if (lookup_node) {
+		dwc->usb3_phy[ss_idx] = devm_of_usb_get_phy_by_phandle(dev,
+								"usb-phy", 1, lookup_node);
+	} else {
+		dwc->usb3_phy[ss_idx] = devm_usb_get_phy(dev, USB_PHY_TYPE_USB3);
+	}
+
+	if (IS_ERR(dwc->usb3_phy[ss_idx])) {
+		ret = PTR_ERR(dwc->usb3_phy[ss_idx]);
+		if (ret == -ENXIO || ret == -ENODEV)
+			dwc->usb3_phy[ss_idx] = NULL;
 		else
-			return dev_err_probe(dev, ret, "no usb2 phy configured\n");
+			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
 	}
 
-	dwc->usb3_generic_phy = devm_phy_get(dev, "usb3-phy");
-	if (IS_ERR(dwc->usb3_generic_phy)) {
-		ret = PTR_ERR(dwc->usb3_generic_phy);
-		if (ret == -ENOSYS || ret == -ENODEV)
-			dwc->usb3_generic_phy = NULL;
+	dwc->usb3_generic_phy[ss_idx] = devm_of_phy_get(dev, lookup_node, "usb3-phy");
+	if (IS_ERR(dwc->usb3_generic_phy[ss_idx])) {
+		ret = PTR_ERR(dwc->usb3_generic_phy[ss_idx]);
+		if (ret == -ENODEV)
+			dwc->usb3_generic_phy[ss_idx] = NULL;
 		else
 			return dev_err_probe(dev, ret, "no usb3 phy configured\n");
 	}
+	return 0;
+}
+
+static int dwc3_core_get_phy(struct dwc3 *dwc)
+{
+	struct device		*dev = dwc->dev;
+	struct device_node	*node = dev->of_node;
+	struct device_node	*ports, *port;
+	int ret, i = 0, j = 0;
+
+	ret = dwc3_extract_num_phys(dwc);
+	if (ret) {
+		dev_err(dwc->dev, "Unable to extract number of PHYs\n");
+		return ret;
+	}
+
+	/* Find if any "multiport" child is present inside DWC3 */
+	for_each_available_child_of_node(node, ports) {
+		if (!strcmp(ports->name, "multiport"))
+			break;
+	}
+
+	if (!ports) {
+		ret = dwc3_core_get_phy_by_node(dwc, node, 0, 0);
+		if (ret)
+			return ret;
+	} else {
+		for_each_available_child_of_node(ports, port) {
+			if (dwc3_count_phys(dwc, port) == 2)
+				ret = dwc3_core_get_phy_by_node(dwc, port, i++, j++);
+			else if (dwc3_count_phys(dwc, port) == 1)
+				ret = dwc3_core_get_phy_by_node(dwc, port, i++, -1);
+			else
+				continue;
+
+			if (ret) {
+				of_node_put(port);
+				return ret;
+			}
+		}
+	}
 
 	return 0;
 }
@@ -1305,16 +1459,16 @@ static int dwc3_core_get_phy(struct dwc3 *dwc)
 static int dwc3_core_init_mode(struct dwc3 *dwc)
 {
 	struct device *dev = dwc->dev;
-	int ret;
+	int i, ret;
 
 	switch (dwc->dr_mode) {
 	case USB_DR_MODE_PERIPHERAL:
 		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_DEVICE);
 
-		if (dwc->usb2_phy)
-			otg_set_vbus(dwc->usb2_phy->otg, false);
-		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_DEVICE);
-		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_DEVICE);
+		if (dwc->usb2_phy[0])
+			otg_set_vbus(dwc->usb2_phy[0]->otg, false);
+		phy_set_mode(dwc->usb2_generic_phy[0], PHY_MODE_USB_DEVICE);
+		phy_set_mode(dwc->usb3_generic_phy[0], PHY_MODE_USB_DEVICE);
 
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
@@ -1323,10 +1477,15 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
 	case USB_DR_MODE_HOST:
 		dwc3_set_prtcap(dwc, DWC3_GCTL_PRTCAP_HOST);
 
-		if (dwc->usb2_phy)
-			otg_set_vbus(dwc->usb2_phy->otg, true);
-		phy_set_mode(dwc->usb2_generic_phy, PHY_MODE_USB_HOST);
-		phy_set_mode(dwc->usb3_generic_phy, PHY_MODE_USB_HOST);
+		for (i = 0; i < dwc->num_usb3_phy; i++) {
+			if (dwc->usb2_phy[i])
+				otg_set_vbus(dwc->usb2_phy[i]->otg, true);
+			phy_set_mode(dwc->usb2_generic_phy[i], PHY_MODE_USB_HOST);
+		}
+
+
+		for (i = 0; i < dwc->num_usb3_phy; i++)
+			phy_set_mode(dwc->usb3_generic_phy[i], PHY_MODE_USB_HOST);
 
 		ret = dwc3_host_init(dwc);
 		if (ret)
@@ -1674,7 +1833,7 @@ static int dwc3_probe(struct platform_device *pdev)
 	struct resource		*res, dwc_res;
 	struct dwc3		*dwc;
 
-	int			ret;
+	int			ret, i;
 
 	void __iomem		*regs;
 
@@ -1839,15 +1998,18 @@ static int dwc3_probe(struct platform_device *pdev)
 	dwc3_debugfs_exit(dwc);
 	dwc3_event_buffers_cleanup(dwc);
 
-	usb_phy_shutdown(dwc->usb2_phy);
-	usb_phy_shutdown(dwc->usb3_phy);
-	phy_exit(dwc->usb2_generic_phy);
-	phy_exit(dwc->usb3_generic_phy);
-
-	usb_phy_set_suspend(dwc->usb2_phy, 1);
-	usb_phy_set_suspend(dwc->usb3_phy, 1);
-	phy_power_off(dwc->usb2_generic_phy);
-	phy_power_off(dwc->usb3_generic_phy);
+	for (i = 0; i < dwc->num_usb2_phy; i++) {
+		usb_phy_shutdown(dwc->usb2_phy[i]);
+		usb_phy_set_suspend(dwc->usb2_phy[i], 1);
+		phy_exit(dwc->usb2_generic_phy[i]);
+		phy_power_off(dwc->usb2_generic_phy[i]);
+	}
+	for (i = 0; i < dwc->num_usb3_phy; i++) {
+		usb_phy_shutdown(dwc->usb3_phy[i]);
+		usb_phy_set_suspend(dwc->usb3_phy[i], 1);
+		phy_exit(dwc->usb3_generic_phy[i]);
+		phy_power_off(dwc->usb3_generic_phy[i]);
+	}
 
 	dwc3_ulpi_exit(dwc);
 
@@ -1929,6 +2091,7 @@ static int dwc3_core_init_for_resume(struct dwc3 *dwc)
 
 static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 {
+	int i;
 	unsigned long	flags;
 	u32 reg;
 
@@ -1951,17 +2114,21 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 		/* Let controller to suspend HSPHY before PHY driver suspends */
 		if (dwc->dis_u2_susphy_quirk ||
 		    dwc->dis_enblslpm_quirk) {
-			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-			reg |=  DWC3_GUSB2PHYCFG_ENBLSLPM |
-				DWC3_GUSB2PHYCFG_SUSPHY;
-			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
-
-			/* Give some time for USB2 PHY to suspend */
-			usleep_range(5000, 6000);
+			for (i = 0; i < dwc->num_usb2_phy; i++) {
+				reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
+				reg |=  DWC3_GUSB2PHYCFG_ENBLSLPM |
+					DWC3_GUSB2PHYCFG_SUSPHY;
+				dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
+
+				/* Give some time for USB2 PHY to suspend */
+				usleep_range(5000, 6000);
+			}
 		}
 
-		phy_pm_runtime_put_sync(dwc->usb2_generic_phy);
-		phy_pm_runtime_put_sync(dwc->usb3_generic_phy);
+		for (i = 0; i < dwc->num_usb2_phy; i++)
+			phy_pm_runtime_put_sync(dwc->usb2_generic_phy[i]);
+		for (i = 0; i < dwc->num_usb3_phy; i++)
+			phy_pm_runtime_put_sync(dwc->usb3_generic_phy[i]);
 		break;
 	case DWC3_GCTL_PRTCAP_OTG:
 		/* do nothing during runtime_suspend */
@@ -1989,7 +2156,7 @@ static int dwc3_suspend_common(struct dwc3 *dwc, pm_message_t msg)
 static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
 {
 	unsigned long	flags;
-	int		ret;
+	int		i, ret;
 	u32		reg;
 
 	switch (dwc->current_dr_role) {
@@ -2012,17 +2179,21 @@ static int dwc3_resume_common(struct dwc3 *dwc, pm_message_t msg)
 			break;
 		}
 		/* Restore GUSB2PHYCFG bits that were modified in suspend */
-		reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(0));
-		if (dwc->dis_u2_susphy_quirk)
-			reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
+		for (i = 0; i < dwc->num_usb2_phy; i++) {
+			reg = dwc3_readl(dwc->regs, DWC3_GUSB2PHYCFG(i));
+			if (dwc->dis_u2_susphy_quirk)
+				reg &= ~DWC3_GUSB2PHYCFG_SUSPHY;
 
-		if (dwc->dis_enblslpm_quirk)
-			reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
+			if (dwc->dis_enblslpm_quirk)
+				reg &= ~DWC3_GUSB2PHYCFG_ENBLSLPM;
 
-		dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(0), reg);
+			dwc3_writel(dwc->regs, DWC3_GUSB2PHYCFG(i), reg);
+		}
 
-		phy_pm_runtime_get_sync(dwc->usb2_generic_phy);
-		phy_pm_runtime_get_sync(dwc->usb3_generic_phy);
+		for (i = 0; i < dwc->num_usb2_phy; i++)
+			phy_pm_runtime_get_sync(dwc->usb2_generic_phy[i]);
+		for (i = 0; i < dwc->num_usb3_phy; i++)
+			phy_pm_runtime_get_sync(dwc->usb3_generic_phy[i]);
 		break;
 	case DWC3_GCTL_PRTCAP_OTG:
 		/* nothing to do on runtime_resume */
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 81c486b..c858689 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -1020,6 +1020,8 @@ struct dwc3_scratchpad_array {
  * @usb_psy: pointer to power supply interface.
  * @usb2_phy: pointer to USB2 PHY
  * @usb3_phy: pointer to USB3 PHY
+ * @num_usb2_phy: Number of HS ports controlled by the core
+ * @num_usb3_phy: Number of SS ports controlled by the core
  * @usb2_generic_phy: pointer to USB2 PHY
  * @usb3_generic_phy: pointer to USB3 PHY
  * @phys_ready: flag to indicate that PHYs are ready
@@ -1147,11 +1149,13 @@ struct dwc3 {
 
 	struct reset_control	*reset;
 
-	struct usb_phy		*usb2_phy;
-	struct usb_phy		*usb3_phy;
+	struct usb_phy		**usb2_phy;
+	struct usb_phy		**usb3_phy;
+	u32			num_usb2_phy;
+	u32			num_usb3_phy;
 
-	struct phy		*usb2_generic_phy;
-	struct phy		*usb3_generic_phy;
+	struct phy		**usb2_generic_phy;
+	struct phy		**usb3_generic_phy;
 
 	bool			phys_ready;
 
diff --git a/drivers/usb/dwc3/drd.c b/drivers/usb/dwc3/drd.c
index 039bf24..404643f 100644
--- a/drivers/usb/dwc3/drd.c
+++ b/drivers/usb/dwc3/drd.c
@@ -384,10 +384,10 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
 		if (ret) {
 			dev_err(dwc->dev, "failed to initialize host\n");
 		} else {
-			if (dwc->usb2_phy)
-				otg_set_vbus(dwc->usb2_phy->otg, true);
-			if (dwc->usb2_generic_phy)
-				phy_set_mode(dwc->usb2_generic_phy,
+			if (dwc->usb2_phy[0])
+				otg_set_vbus(dwc->usb2_phy[0]->otg, true);
+			if (dwc->usb2_generic_phy[0])
+				phy_set_mode(dwc->usb2_generic_phy[0],
 					     PHY_MODE_USB_HOST);
 		}
 		break;
@@ -398,10 +398,10 @@ void dwc3_otg_update(struct dwc3 *dwc, bool ignore_idstatus)
 		dwc3_event_buffers_setup(dwc);
 		spin_unlock_irqrestore(&dwc->lock, flags);
 
-		if (dwc->usb2_phy)
-			otg_set_vbus(dwc->usb2_phy->otg, false);
-		if (dwc->usb2_generic_phy)
-			phy_set_mode(dwc->usb2_generic_phy,
+		if (dwc->usb2_phy[0])
+			otg_set_vbus(dwc->usb2_phy[0]->otg, false);
+		if (dwc->usb2_generic_phy[0])
+			phy_set_mode(dwc->usb2_generic_phy[0],
 				     PHY_MODE_USB_DEVICE);
 		ret = dwc3_gadget_init(dwc);
 		if (ret)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 00427d1..e3b2a17 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -2872,8 +2872,8 @@ static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
 	union power_supply_propval	val = {0};
 	int				ret;
 
-	if (dwc->usb2_phy)
-		return usb_phy_set_power(dwc->usb2_phy, mA);
+	if (dwc->usb2_phy[0])
+		return usb_phy_set_power(dwc->usb2_phy[0], mA);
 
 	if (!dwc->usb_psy)
 		return -EOPNOTSUPP;
-- 
2.7.4

Re: [PATCH v2 1/3] dt-bindings: usb: dwc3: Add support for multiport related properties

[Rob Herring]

On Fri, 03 Jun 2022 22:42:40 +0530, Harsh Agarwal wrote:
> Added support for multiport, mport, num_usb2_phy and num_usb3_phy
> properties. These properties are used to support devices having
> a multiport controller.
> 
> Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
> ---
>  .../devicetree/bindings/usb/snps,dwc3.yaml         | 55 ++++++++++++++++++++++
>  1 file changed, 55 insertions(+)
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:
./Documentation/devicetree/bindings/usb/snps,dwc3.yaml:366:8: [warning] wrong indentation: expected 6 but found 7 (indentation)
./Documentation/devicetree/bindings/usb/snps,dwc3.yaml:367:10: [warning] wrong indentation: expected 11 but found 9 (indentation)
./Documentation/devicetree/bindings/usb/snps,dwc3.yaml:369:11: [warning] wrong indentation: expected 11 but found 10 (indentation)

dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/usb/snps,dwc3.example.dtb: usb@4a000000: multiport: 'mport' is a required property
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/usb/snps,dwc3.yaml

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.

Re: [PATCH v2 2/3] usb: phy: Add devm_of_usb_get_phy_by_phandle

[Sergey Shtylyov]

Hello!

On 6/3/22 8:12 PM, Harsh Agarwal wrote:

> Adding support for devm_of_usb_get_phy_by_phandle which allows
> us to get PHY phandles of a device declared inside lookup_node.
> 
> Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
[...]
> diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
> index e4de6bc..2581c72 100644
> --- a/include/linux/usb/phy.h
> +++ b/include/linux/usb/phy.h
[...]
> @@ -249,6 +251,12 @@ static inline struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
>  	return ERR_PTR(-ENXIO);
>  }
>  
> +extern inline struct usb_phy *devm_of_usb_get_phy_by_phandle(struct device *dev,

   *extern inline*? :-O
   Shouldn't it be *static*?
 
> +	const char *phandle, u8 index, struct device_node *lookup_node)
> +{
> +	return ERR_PTR(-ENXIO);
> +}
> +
>  static inline struct usb_phy *devm_usb_get_phy_by_node(struct device *dev,
>  	struct device_node *node, struct notifier_block *nb)
>  {

MBR, Sergey

Re: [PATCH v2 2/3] usb: phy: Add devm_of_usb_get_phy_by_phandle

[Harsh Agarwal]

On 6/6/2022 4:30 PM, Sergey Shtylyov wrote:
> Hello!
>
> On 6/3/22 8:12 PM, Harsh Agarwal wrote:
>
>> Adding support for devm_of_usb_get_phy_by_phandle which allows
>> us to get PHY phandles of a device declared inside lookup_node.
>>
>> Signed-off-by: Harsh Agarwal <quic_harshq@quicinc.com>
> [...]
>> diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
>> index e4de6bc..2581c72 100644
>> --- a/include/linux/usb/phy.h
>> +++ b/include/linux/usb/phy.h
> [...]
>> @@ -249,6 +251,12 @@ static inline struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
>>   	return ERR_PTR(-ENXIO);
>>   }
>>   
>> +extern inline struct usb_phy *devm_of_usb_get_phy_by_phandle(struct device *dev,
>     *extern inline*? :-O
>     Shouldn't it be *static*?
This was a typo. Will change it. Thanks
>   
>> +	const char *phandle, u8 index, struct device_node *lookup_node)
>> +{
>> +	return ERR_PTR(-ENXIO);
>> +}
>> +
>>   static inline struct usb_phy *devm_usb_get_phy_by_node(struct device *dev,
>>   	struct device_node *node, struct notifier_block *nb)
>>   {
> MBR, Sergey