[PATCH v4 0/5] usb: dwc2: Add support for USB OTG on STM32F4x9

[PATCH v4 0/5] usb: dwc2: Add support for USB OTG on STM32F4x9

[Bruno Herrera]

The STM32F4x9 MCU family has two DWC2 USB OTG cores on it. One core is
USB OTG FS and other core is USB OTG HS. The USB FS core only works with
its internal phy whilst the USF HS core can work in HS with external ulpi
phy or in FS/LS speed with the embedded FS PHY.

The goal of this patch series is to enable the use of USB OTG FS/HS cores
in FS mode using the internal phy.

Changes since v4:
- Rebase on top of repository https://github.com/synopsys-usb/linux
- Changes var names from STM32F4xx to STM32F4x9

Changes since v3:
- Removed commented lines from patch (sent by mistake)
- Split DTS patch by boards and SOC
- Removed unnecessary pinctrl nodes from DTS files

Changes since v2:
- Rename driver variables to meet the driver standard
- Add compatible string for HS core

Changes since v1:
- Add dwc2_core_params structure for stm32f4 otg fs
- Add compatible string for FS core/mode
- Use GGPIO register to deativate power down of the phy

Bruno Herrera (5):
  usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode
    (internal PHY)
  ARM: dts: stm32: Add USB FS support for STM32F429 MCU
  ARM: dts: stm32: Enable USB FS on stm32f469-disco
  ARM: dts: stm32: Enable USB HS in FS mode (embedded phy) on
    stm32f429-disco
  dt-bindings: Document the STM32 USB OTG DWC2 core binding

 Documentation/devicetree/bindings/usb/dwc2.txt |  4 ++++
 arch/arm/boot/dts/stm32f429-disco.dts          | 16 +++++++++++++
 arch/arm/boot/dts/stm32f429.dtsi               | 31 ++++++++++++++++++++++++++
 arch/arm/boot/dts/stm32f469-disco.dts          | 16 +++++++++++++
 drivers/usb/dwc2/core.h                        |  4 ++++
 drivers/usb/dwc2/hcd.c                         | 13 ++++++++++-
 drivers/usb/dwc2/hw.h                          |  2 ++
 drivers/usb/dwc2/params.c                      | 20 +++++++++++++++++
 8 files changed, 105 insertions(+), 1 deletion(-)

-- 
2.10.1 (Apple Git-78)

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[PATCH v4 0/5] usb: dwc2: Add support for USB OTG on STM32F4x9

[Bruno Herrera]

The STM32F4x9 MCU family has two DWC2 USB OTG cores on it. One core is
USB OTG FS and other core is USB OTG HS. The USB FS core only works with
its internal phy whilst the USF HS core can work in HS with external ulpi
phy or in FS/LS speed with the embedded FS PHY.

The goal of this patch series is to enable the use of USB OTG FS/HS cores
in FS mode using the internal phy.

Changes since v4:
- Rebase on top of repository https://github.com/synopsys-usb/linux
- Changes var names from STM32F4xx to STM32F4x9

Changes since v3:
- Removed commented lines from patch (sent by mistake)
- Split DTS patch by boards and SOC
- Removed unnecessary pinctrl nodes from DTS files

Changes since v2:
- Rename driver variables to meet the driver standard
- Add compatible string for HS core

Changes since v1:
- Add dwc2_core_params structure for stm32f4 otg fs
- Add compatible string for FS core/mode
- Use GGPIO register to deativate power down of the phy

Bruno Herrera (5):
  usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode
    (internal PHY)
  ARM: dts: stm32: Add USB FS support for STM32F429 MCU
  ARM: dts: stm32: Enable USB FS on stm32f469-disco
  ARM: dts: stm32: Enable USB HS in FS mode (embedded phy) on
    stm32f429-disco
  dt-bindings: Document the STM32 USB OTG DWC2 core binding

 Documentation/devicetree/bindings/usb/dwc2.txt |  4 ++++
 arch/arm/boot/dts/stm32f429-disco.dts          | 16 +++++++++++++
 arch/arm/boot/dts/stm32f429.dtsi               | 31 ++++++++++++++++++++++++++
 arch/arm/boot/dts/stm32f469-disco.dts          | 16 +++++++++++++
 drivers/usb/dwc2/core.h                        |  4 ++++
 drivers/usb/dwc2/hcd.c                         | 13 ++++++++++-
 drivers/usb/dwc2/hw.h                          |  2 ++
 drivers/usb/dwc2/params.c                      | 20 +++++++++++++++++
 8 files changed, 105 insertions(+), 1 deletion(-)

-- 
2.10.1 (Apple Git-78)

[PATCH v4 1/5] usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)

[Bruno Herrera]

This patch introduces a new parameter to activate USB OTG HS/FS core embedded
phy transceiver. The STM32F4x9 SoC uses the GGPIO register to enable the transceiver.
Also add the dwc2_core_params structure for stm32f4 otg fs.

Signed-off-by: Bruno Herrera <bruherrera-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 drivers/usb/dwc2/core.h   |  4 ++++
 drivers/usb/dwc2/hcd.c    | 13 ++++++++++++-
 drivers/usb/dwc2/hw.h     |  2 ++
 drivers/usb/dwc2/params.c | 20 ++++++++++++++++++++
 4 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index b9b62f1..ed8ce42 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -423,6 +423,9 @@ enum dwc2_ep0_state {
  *			needed.
  *			0 - No (default)
  *			1 - Yes
+ * @activate_transceiver: Activate internal transceiver using GGPIO register.
+ *			0 - Deactivate the transceiver (default)
+ *			1 - Activate the transceiver
  * @g_dma:              Enables gadget dma usage (default: autodetect).
  * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).
  * @g_rx_fifo_size:	The periodic rx fifo size for the device, in
@@ -477,6 +480,7 @@ struct dwc2_core_params {
 	bool uframe_sched;
 	bool external_id_pin_ctl;
 	bool hibernation;
+	bool activate_transceiver;
 	u16 max_packet_count;
 	u32 max_transfer_size;
 	u32 ahbcfg;
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index a73722e..190a441 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
 
 static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 {
-	u32 usbcfg, i2cctl;
+	u32 usbcfg, ggpio, i2cctl;
 	int retval = 0;
 
 	/*
@@ -145,6 +145,17 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 				return retval;
 			}
 		}
+
+		ggpio = dwc2_readl(hsotg->regs + GGPIO);
+		if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN) &&
+		    (hsotg->params.activate_transceiver > 0)) {
+			dev_dbg(hsotg->dev, "Activating transceiver\n");
+			/* STM32F4x9 uses the GGPIO register as general core
+			 * configuration register.
+			 */
+			ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
+			dwc2_writel(ggpio, hsotg->regs + GGPIO);
+		}
 	}
 
 	/*
diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
index bde7248..9b432c1 100644
--- a/drivers/usb/dwc2/hw.h
+++ b/drivers/usb/dwc2/hw.h
@@ -225,6 +225,8 @@
 
 #define GPVNDCTL			HSOTG_REG(0x0034)
 #define GGPIO				HSOTG_REG(0x0038)
+#define GGPIO_STM32_OTG_GCCFG_PWRDWN	(1 << 16)
+
 #define GUID				HSOTG_REG(0x003c)
 #define GSNPSID				HSOTG_REG(0x0040)
 #define GHWCFG1				HSOTG_REG(0x0044)
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 2990c34..a35abba 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -120,6 +120,23 @@ static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
 	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
 }
 
+static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
+	p->speed = DWC2_SPEED_PARAM_FULL;
+	p->host_rx_fifo_size = 128;
+	p->host_nperio_tx_fifo_size = 96;
+	p->host_perio_tx_fifo_size = 96;
+	p->max_packet_count = 256;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
+	p->i2c_enable = false;
+	p->uframe_sched = false;
+	p->activate_transceiver = true;
+
+}
+
 const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
 	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
@@ -133,6 +150,9 @@ const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "amlogic,meson-gxbb-usb",
 	  .data = dwc2_set_amlogic_params },
 	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
+	{ .compatible = "st,stm32f4x9-fsotg",
+	  .data = dwc2_set_stm32f4x9_fsotg_params },
+	{ .compatible = "st,stm32f4x9-hsotg" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
-- 
2.10.1 (Apple Git-78)

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[PATCH v4 1/5] usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)

[Bruno Herrera]

This patch introduces a new parameter to activate USB OTG HS/FS core embedded
phy transceiver. The STM32F4x9 SoC uses the GGPIO register to enable the transceiver.
Also add the dwc2_core_params structure for stm32f4 otg fs.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
---
 drivers/usb/dwc2/core.h   |  4 ++++
 drivers/usb/dwc2/hcd.c    | 13 ++++++++++++-
 drivers/usb/dwc2/hw.h     |  2 ++
 drivers/usb/dwc2/params.c | 20 ++++++++++++++++++++
 4 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
index b9b62f1..ed8ce42 100644
--- a/drivers/usb/dwc2/core.h
+++ b/drivers/usb/dwc2/core.h
@@ -423,6 +423,9 @@ enum dwc2_ep0_state {
  *			needed.
  *			0 - No (default)
  *			1 - Yes
+ * @activate_transceiver: Activate internal transceiver using GGPIO register.
+ *			0 - Deactivate the transceiver (default)
+ *			1 - Activate the transceiver
  * @g_dma:              Enables gadget dma usage (default: autodetect).
  * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).
  * @g_rx_fifo_size:	The periodic rx fifo size for the device, in
@@ -477,6 +480,7 @@ struct dwc2_core_params {
 	bool uframe_sched;
 	bool external_id_pin_ctl;
 	bool hibernation;
+	bool activate_transceiver;
 	u16 max_packet_count;
 	u32 max_transfer_size;
 	u32 ahbcfg;
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
index a73722e..190a441 100644
--- a/drivers/usb/dwc2/hcd.c
+++ b/drivers/usb/dwc2/hcd.c
@@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
 
 static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 {
-	u32 usbcfg, i2cctl;
+	u32 usbcfg, ggpio, i2cctl;
 	int retval = 0;
 
 	/*
@@ -145,6 +145,17 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
 				return retval;
 			}
 		}
+
+		ggpio = dwc2_readl(hsotg->regs + GGPIO);
+		if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN) &&
+		    (hsotg->params.activate_transceiver > 0)) {
+			dev_dbg(hsotg->dev, "Activating transceiver\n");
+			/* STM32F4x9 uses the GGPIO register as general core
+			 * configuration register.
+			 */
+			ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
+			dwc2_writel(ggpio, hsotg->regs + GGPIO);
+		}
 	}
 
 	/*
diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
index bde7248..9b432c1 100644
--- a/drivers/usb/dwc2/hw.h
+++ b/drivers/usb/dwc2/hw.h
@@ -225,6 +225,8 @@
 
 #define GPVNDCTL			HSOTG_REG(0x0034)
 #define GGPIO				HSOTG_REG(0x0038)
+#define GGPIO_STM32_OTG_GCCFG_PWRDWN	(1 << 16)
+
 #define GUID				HSOTG_REG(0x003c)
 #define GSNPSID				HSOTG_REG(0x0040)
 #define GHWCFG1				HSOTG_REG(0x0044)
diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
index 2990c34..a35abba 100644
--- a/drivers/usb/dwc2/params.c
+++ b/drivers/usb/dwc2/params.c
@@ -120,6 +120,23 @@ static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
 	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
 }
 
+static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
+{
+	struct dwc2_core_params *p = &hsotg->params;
+
+	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
+	p->speed = DWC2_SPEED_PARAM_FULL;
+	p->host_rx_fifo_size = 128;
+	p->host_nperio_tx_fifo_size = 96;
+	p->host_perio_tx_fifo_size = 96;
+	p->max_packet_count = 256;
+	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
+	p->i2c_enable = false;
+	p->uframe_sched = false;
+	p->activate_transceiver = true;
+
+}
+
 const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
 	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
@@ -133,6 +150,9 @@ const struct of_device_id dwc2_of_match_table[] = {
 	{ .compatible = "amlogic,meson-gxbb-usb",
 	  .data = dwc2_set_amlogic_params },
 	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
+	{ .compatible = "st,stm32f4x9-fsotg",
+	  .data = dwc2_set_stm32f4x9_fsotg_params },
+	{ .compatible = "st,stm32f4x9-hsotg" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
-- 
2.10.1 (Apple Git-78)

[PATCH v4 2/5] ARM: dts: stm32: Add USB FS support for STM32F429 MCU

[Bruno Herrera]

This patch adds the USB pins and nodes for USB FS core.

Signed-off-by: Bruno Herrera <bruherrera-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 arch/arm/boot/dts/stm32f429.dtsi | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f429.dtsi b/arch/arm/boot/dts/stm32f429.dtsi
index e4dae0e..9afa455 100644
--- a/arch/arm/boot/dts/stm32f429.dtsi
+++ b/arch/arm/boot/dts/stm32f429.dtsi
@@ -316,6 +316,28 @@
 				};
 			};
 
+			usbotg_fs_pins_a: usbotg_fs@0 {
+				pins {
+					pinmux = <STM32F429_PA10_FUNC_OTG_FS_ID>,
+						 <STM32F429_PA11_FUNC_OTG_FS_DM>,
+						 <STM32F429_PA12_FUNC_OTG_FS_DP>;
+					bias-disable;
+					drive-push-pull;
+					slew-rate = <2>;
+				};
+			};
+
+			usbotg_fs_pins_b: usbotg_fs@1 {
+				pins {
+					pinmux = <STM32F429_PB12_FUNC_OTG_HS_ID>,
+						 <STM32F429_PB14_FUNC_OTG_HS_DM>,
+						 <STM32F429_PB15_FUNC_OTG_HS_DP>;
+					bias-disable;
+					drive-push-pull;
+					slew-rate = <2>;
+				};
+			};
+
 			usbotg_hs_pins_a: usbotg_hs@0 {
 				pins {
 					pinmux = <STM32F429_PH4_FUNC_OTG_HS_ULPI_NXT>,
@@ -420,6 +442,15 @@
 			status = "disabled";
 		};
 
+		usbotg_fs: usb@50000000 {
+			compatible = "st,stm32f4x9-fsotg";
+			reg = <0x50000000 0x40000>;
+			interrupts = <67>;
+			clocks = <&rcc 0 39>;
+			clock-names = "otg";
+			status = "disabled";
+		};
+
 		rng: rng@50060800 {
 			compatible = "st,stm32-rng";
 			reg = <0x50060800 0x400>;
-- 
2.10.1 (Apple Git-78)

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[PATCH v4 2/5] ARM: dts: stm32: Add USB FS support for STM32F429 MCU

[Bruno Herrera]

This patch adds the USB pins and nodes for USB FS core.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
---
 arch/arm/boot/dts/stm32f429.dtsi | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f429.dtsi b/arch/arm/boot/dts/stm32f429.dtsi
index e4dae0e..9afa455 100644
--- a/arch/arm/boot/dts/stm32f429.dtsi
+++ b/arch/arm/boot/dts/stm32f429.dtsi
@@ -316,6 +316,28 @@
 				};
 			};
 
+			usbotg_fs_pins_a: usbotg_fs at 0 {
+				pins {
+					pinmux = <STM32F429_PA10_FUNC_OTG_FS_ID>,
+						 <STM32F429_PA11_FUNC_OTG_FS_DM>,
+						 <STM32F429_PA12_FUNC_OTG_FS_DP>;
+					bias-disable;
+					drive-push-pull;
+					slew-rate = <2>;
+				};
+			};
+
+			usbotg_fs_pins_b: usbotg_fs at 1 {
+				pins {
+					pinmux = <STM32F429_PB12_FUNC_OTG_HS_ID>,
+						 <STM32F429_PB14_FUNC_OTG_HS_DM>,
+						 <STM32F429_PB15_FUNC_OTG_HS_DP>;
+					bias-disable;
+					drive-push-pull;
+					slew-rate = <2>;
+				};
+			};
+
 			usbotg_hs_pins_a: usbotg_hs at 0 {
 				pins {
 					pinmux = <STM32F429_PH4_FUNC_OTG_HS_ULPI_NXT>,
@@ -420,6 +442,15 @@
 			status = "disabled";
 		};
 
+		usbotg_fs: usb at 50000000 {
+			compatible = "st,stm32f4x9-fsotg";
+			reg = <0x50000000 0x40000>;
+			interrupts = <67>;
+			clocks = <&rcc 0 39>;
+			clock-names = "otg";
+			status = "disabled";
+		};
+
 		rng: rng at 50060800 {
 			compatible = "st,stm32-rng";
 			reg = <0x50060800 0x400>;
-- 
2.10.1 (Apple Git-78)

[PATCH v4 3/5] ARM: dts: stm32: Enable USB FS on stm32f469-disco

[Bruno Herrera]

This patch enables USB FS on stm32f469-disco with 5V VBUS enable.

Signed-off-by: Bruno Herrera <bruherrera-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 arch/arm/boot/dts/stm32f469-disco.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f469-disco.dts b/arch/arm/boot/dts/stm32f469-disco.dts
index 8877c00..3e0a83e 100644
--- a/arch/arm/boot/dts/stm32f469-disco.dts
+++ b/arch/arm/boot/dts/stm32f469-disco.dts
@@ -68,6 +68,15 @@
 	soc {
 		dma-ranges = <0xc0000000 0x0 0x10000000>;
 	};
+
+	/* This turns on vbus for otg for host mode (dwc2) */
+	vcc5v_otg: vcc5v-otg-regulator {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpiob 2 0>;
+		regulator-name = "vcc5_host1";
+		regulator-always-on;
+	};
 };
 
 &rcc {
@@ -81,3 +90,10 @@
 &usart3 {
 	status = "okay";
 };
+
+&usbotg_fs {
+	dr_mode = "host";
+	pinctrl-0 = <&usbotg_fs_pins_a>;
+	pinctrl-names = "default";
+	status = "okay";
+};
-- 
2.10.1 (Apple Git-78)

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[PATCH v4 3/5] ARM: dts: stm32: Enable USB FS on stm32f469-disco

[Bruno Herrera]

This patch enables USB FS on stm32f469-disco with 5V VBUS enable.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
---
 arch/arm/boot/dts/stm32f469-disco.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f469-disco.dts b/arch/arm/boot/dts/stm32f469-disco.dts
index 8877c00..3e0a83e 100644
--- a/arch/arm/boot/dts/stm32f469-disco.dts
+++ b/arch/arm/boot/dts/stm32f469-disco.dts
@@ -68,6 +68,15 @@
 	soc {
 		dma-ranges = <0xc0000000 0x0 0x10000000>;
 	};
+
+	/* This turns on vbus for otg for host mode (dwc2) */
+	vcc5v_otg: vcc5v-otg-regulator {
+		compatible = "regulator-fixed";
+		enable-active-high;
+		gpio = <&gpiob 2 0>;
+		regulator-name = "vcc5_host1";
+		regulator-always-on;
+	};
 };
 
 &rcc {
@@ -81,3 +90,10 @@
 &usart3 {
 	status = "okay";
 };
+
+&usbotg_fs {
+	dr_mode = "host";
+	pinctrl-0 = <&usbotg_fs_pins_a>;
+	pinctrl-names = "default";
+	status = "okay";
+};
-- 
2.10.1 (Apple Git-78)

[PATCH v4 4/5] ARM: dts: stm32: Enable USB HS in FS mode (embedded phy) on stm32f429-disco

[Bruno Herrera]

This patch enables USB HS working in FS mode on stm32f429-disco
with 5V VBUS enable.

Signed-off-by: Bruno Herrera <bruherrera-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
 arch/arm/boot/dts/stm32f429-disco.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f429-disco.dts b/arch/arm/boot/dts/stm32f429-disco.dts
index 7d0415e..216782f 100644
--- a/arch/arm/boot/dts/stm32f429-disco.dts
+++ b/arch/arm/boot/dts/stm32f429-disco.dts
@@ -88,6 +88,14 @@
 			gpios = <&gpioa 0 0>;
 		};
 	};
+
+	/* This turns on vbus for otg for host mode (dwc2) */
+	vcc5v_otg: vcc5v-otg-regulator {
+		compatible = "regulator-fixed";
+		gpio = <&gpioc 4 0>;
+		regulator-name = "vcc5_host1";
+		regulator-always-on;
+	};
 };
 
 &clk_hse {
@@ -99,3 +107,11 @@
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&usbotg_hs {
+	compatible = "st,stm32f4x9-fsotg";
+	dr_mode = "host";
+	pinctrl-0 = <&usbotg_fs_pins_b>;
+	pinctrl-names = "default";
+	status = "okay";
+};
-- 
2.10.1 (Apple Git-78)

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[PATCH v4 4/5] ARM: dts: stm32: Enable USB HS in FS mode (embedded phy) on stm32f429-disco

[Bruno Herrera]

This patch enables USB HS working in FS mode on stm32f429-disco
with 5V VBUS enable.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
---
 arch/arm/boot/dts/stm32f429-disco.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/arm/boot/dts/stm32f429-disco.dts b/arch/arm/boot/dts/stm32f429-disco.dts
index 7d0415e..216782f 100644
--- a/arch/arm/boot/dts/stm32f429-disco.dts
+++ b/arch/arm/boot/dts/stm32f429-disco.dts
@@ -88,6 +88,14 @@
 			gpios = <&gpioa 0 0>;
 		};
 	};
+
+	/* This turns on vbus for otg for host mode (dwc2) */
+	vcc5v_otg: vcc5v-otg-regulator {
+		compatible = "regulator-fixed";
+		gpio = <&gpioc 4 0>;
+		regulator-name = "vcc5_host1";
+		regulator-always-on;
+	};
 };
 
 &clk_hse {
@@ -99,3 +107,11 @@
 	pinctrl-names = "default";
 	status = "okay";
 };
+
+&usbotg_hs {
+	compatible = "st,stm32f4x9-fsotg";
+	dr_mode = "host";
+	pinctrl-0 = <&usbotg_fs_pins_b>;
+	pinctrl-names = "default";
+	status = "okay";
+};
-- 
2.10.1 (Apple Git-78)

[PATCH v4 5/5] dt-bindings: Document the STM32 USB OTG DWC2 core binding

[Bruno Herrera]

This patch adds the documentation for STM32F4x9 USB OTG FS/HS compatible strings.

Signed-off-by: Bruno Herrera <bruherrera-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
---
 Documentation/devicetree/bindings/usb/dwc2.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc2.txt b/Documentation/devicetree/bindings/usb/dwc2.txt
index 6c7c2bce..00bea03 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.txt
+++ b/Documentation/devicetree/bindings/usb/dwc2.txt
@@ -14,6 +14,10 @@ Required properties:
   - "amlogic,meson-gxbb-usb": The DWC2 USB controller instance in Amlogic S905 SoCs;
   - "amcc,dwc-otg": The DWC2 USB controller instance in AMCC Canyonlands 460EX SoCs;
   - snps,dwc2: A generic DWC2 USB controller with default parameters.
+  - "st,stm32f4x9-fsotg": The DWC2 USB FS/HS controller instance in STM32F4x9 SoCs
+  configured in FS mode;
+  - "st,stm32f4x9-hsotg": The DWC2 USB HS controller instance in STM32F4x9 SoCs
+  configured in HS mode;
 - reg : Should contain 1 register range (address and length)
 - interrupts : Should contain 1 interrupt
 - clocks: clock provider specifier
-- 
2.10.1 (Apple Git-78)

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[PATCH v4 5/5] dt-bindings: Document the STM32 USB OTG DWC2 core binding

[Bruno Herrera]

This patch adds the documentation for STM32F4x9 USB OTG FS/HS compatible strings.

Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/usb/dwc2.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/dwc2.txt b/Documentation/devicetree/bindings/usb/dwc2.txt
index 6c7c2bce..00bea03 100644
--- a/Documentation/devicetree/bindings/usb/dwc2.txt
+++ b/Documentation/devicetree/bindings/usb/dwc2.txt
@@ -14,6 +14,10 @@ Required properties:
   - "amlogic,meson-gxbb-usb": The DWC2 USB controller instance in Amlogic S905 SoCs;
   - "amcc,dwc-otg": The DWC2 USB controller instance in AMCC Canyonlands 460EX SoCs;
   - snps,dwc2: A generic DWC2 USB controller with default parameters.
+  - "st,stm32f4x9-fsotg": The DWC2 USB FS/HS controller instance in STM32F4x9 SoCs
+  configured in FS mode;
+  - "st,stm32f4x9-hsotg": The DWC2 USB HS controller instance in STM32F4x9 SoCs
+  configured in HS mode;
 - reg : Should contain 1 register range (address and length)
 - interrupts : Should contain 1 interrupt
 - clocks: clock provider specifier
-- 
2.10.1 (Apple Git-78)

Re: [PATCH v4 1/5] usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)

[John Youn]

On 1/28/2017 6:21 PM, Bruno Herrera wrote:
> This patch introduces a new parameter to activate USB OTG HS/FS core embedded
> phy transceiver. The STM32F4x9 SoC uses the GGPIO register to enable the transceiver.
> Also add the dwc2_core_params structure for stm32f4 otg fs.
>

Could you fix the "checkpatch --strict" issues?

Thanks,
John


> Signed-off-by: Bruno Herrera <bruherrera-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/usb/dwc2/core.h   |  4 ++++
>  drivers/usb/dwc2/hcd.c    | 13 ++++++++++++-
>  drivers/usb/dwc2/hw.h     |  2 ++
>  drivers/usb/dwc2/params.c | 20 ++++++++++++++++++++
>  4 files changed, 38 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index b9b62f1..ed8ce42 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -423,6 +423,9 @@ enum dwc2_ep0_state {
>   *			needed.
>   *			0 - No (default)
>   *			1 - Yes
> + * @activate_transceiver: Activate internal transceiver using GGPIO register.
> + *			0 - Deactivate the transceiver (default)
> + *			1 - Activate the transceiver
>   * @g_dma:              Enables gadget dma usage (default: autodetect).
>   * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).
>   * @g_rx_fifo_size:	The periodic rx fifo size for the device, in
> @@ -477,6 +480,7 @@ struct dwc2_core_params {
>  	bool uframe_sched;
>  	bool external_id_pin_ctl;
>  	bool hibernation;
> +	bool activate_transceiver;
>  	u16 max_packet_count;
>  	u32 max_transfer_size;
>  	u32 ahbcfg;
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index a73722e..190a441 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
>
>  static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  {
> -	u32 usbcfg, i2cctl;
> +	u32 usbcfg, ggpio, i2cctl;
>  	int retval = 0;
>
>  	/*
> @@ -145,6 +145,17 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  				return retval;
>  			}
>  		}
> +
> +		ggpio = dwc2_readl(hsotg->regs + GGPIO);
> +		if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN) &&
> +		    (hsotg->params.activate_transceiver > 0)) {
> +			dev_dbg(hsotg->dev, "Activating transceiver\n");
> +			/* STM32F4x9 uses the GGPIO register as general core
> +			 * configuration register.
> +			 */
> +			ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
> +			dwc2_writel(ggpio, hsotg->regs + GGPIO);
> +		}
>  	}
>
>  	/*
> diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
> index bde7248..9b432c1 100644
> --- a/drivers/usb/dwc2/hw.h
> +++ b/drivers/usb/dwc2/hw.h
> @@ -225,6 +225,8 @@
>
>  #define GPVNDCTL			HSOTG_REG(0x0034)
>  #define GGPIO				HSOTG_REG(0x0038)
> +#define GGPIO_STM32_OTG_GCCFG_PWRDWN	(1 << 16)
> +
>  #define GUID				HSOTG_REG(0x003c)
>  #define GSNPSID				HSOTG_REG(0x0040)
>  #define GHWCFG1				HSOTG_REG(0x0044)
> diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
> index 2990c34..a35abba 100644
> --- a/drivers/usb/dwc2/params.c
> +++ b/drivers/usb/dwc2/params.c
> @@ -120,6 +120,23 @@ static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
>  	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
>  }
>
> +static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
> +{
> +	struct dwc2_core_params *p = &hsotg->params;
> +
> +	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
> +	p->speed = DWC2_SPEED_PARAM_FULL;
> +	p->host_rx_fifo_size = 128;
> +	p->host_nperio_tx_fifo_size = 96;
> +	p->host_perio_tx_fifo_size = 96;
> +	p->max_packet_count = 256;
> +	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
> +	p->i2c_enable = false;
> +	p->uframe_sched = false;
> +	p->activate_transceiver = true;
> +
> +}
> +
>  const struct of_device_id dwc2_of_match_table[] = {
>  	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
>  	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
> @@ -133,6 +150,9 @@ const struct of_device_id dwc2_of_match_table[] = {
>  	{ .compatible = "amlogic,meson-gxbb-usb",
>  	  .data = dwc2_set_amlogic_params },
>  	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
> +	{ .compatible = "st,stm32f4x9-fsotg",
> +	  .data = dwc2_set_stm32f4x9_fsotg_params },
> +	{ .compatible = "st,stm32f4x9-hsotg" },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
>

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[PATCH v4 1/5] usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)

[John Youn]

On 1/28/2017 6:21 PM, Bruno Herrera wrote:
> This patch introduces a new parameter to activate USB OTG HS/FS core embedded
> phy transceiver. The STM32F4x9 SoC uses the GGPIO register to enable the transceiver.
> Also add the dwc2_core_params structure for stm32f4 otg fs.
>

Could you fix the "checkpatch --strict" issues?

Thanks,
John


> Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
> ---
>  drivers/usb/dwc2/core.h   |  4 ++++
>  drivers/usb/dwc2/hcd.c    | 13 ++++++++++++-
>  drivers/usb/dwc2/hw.h     |  2 ++
>  drivers/usb/dwc2/params.c | 20 ++++++++++++++++++++
>  4 files changed, 38 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index b9b62f1..ed8ce42 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -423,6 +423,9 @@ enum dwc2_ep0_state {
>   *			needed.
>   *			0 - No (default)
>   *			1 - Yes
> + * @activate_transceiver: Activate internal transceiver using GGPIO register.
> + *			0 - Deactivate the transceiver (default)
> + *			1 - Activate the transceiver
>   * @g_dma:              Enables gadget dma usage (default: autodetect).
>   * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).
>   * @g_rx_fifo_size:	The periodic rx fifo size for the device, in
> @@ -477,6 +480,7 @@ struct dwc2_core_params {
>  	bool uframe_sched;
>  	bool external_id_pin_ctl;
>  	bool hibernation;
> +	bool activate_transceiver;
>  	u16 max_packet_count;
>  	u32 max_transfer_size;
>  	u32 ahbcfg;
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index a73722e..190a441 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
>
>  static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  {
> -	u32 usbcfg, i2cctl;
> +	u32 usbcfg, ggpio, i2cctl;
>  	int retval = 0;
>
>  	/*
> @@ -145,6 +145,17 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  				return retval;
>  			}
>  		}
> +
> +		ggpio = dwc2_readl(hsotg->regs + GGPIO);
> +		if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN) &&
> +		    (hsotg->params.activate_transceiver > 0)) {
> +			dev_dbg(hsotg->dev, "Activating transceiver\n");
> +			/* STM32F4x9 uses the GGPIO register as general core
> +			 * configuration register.
> +			 */
> +			ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
> +			dwc2_writel(ggpio, hsotg->regs + GGPIO);
> +		}
>  	}
>
>  	/*
> diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
> index bde7248..9b432c1 100644
> --- a/drivers/usb/dwc2/hw.h
> +++ b/drivers/usb/dwc2/hw.h
> @@ -225,6 +225,8 @@
>
>  #define GPVNDCTL			HSOTG_REG(0x0034)
>  #define GGPIO				HSOTG_REG(0x0038)
> +#define GGPIO_STM32_OTG_GCCFG_PWRDWN	(1 << 16)
> +
>  #define GUID				HSOTG_REG(0x003c)
>  #define GSNPSID				HSOTG_REG(0x0040)
>  #define GHWCFG1				HSOTG_REG(0x0044)
> diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
> index 2990c34..a35abba 100644
> --- a/drivers/usb/dwc2/params.c
> +++ b/drivers/usb/dwc2/params.c
> @@ -120,6 +120,23 @@ static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
>  	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
>  }
>
> +static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
> +{
> +	struct dwc2_core_params *p = &hsotg->params;
> +
> +	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
> +	p->speed = DWC2_SPEED_PARAM_FULL;
> +	p->host_rx_fifo_size = 128;
> +	p->host_nperio_tx_fifo_size = 96;
> +	p->host_perio_tx_fifo_size = 96;
> +	p->max_packet_count = 256;
> +	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
> +	p->i2c_enable = false;
> +	p->uframe_sched = false;
> +	p->activate_transceiver = true;
> +
> +}
> +
>  const struct of_device_id dwc2_of_match_table[] = {
>  	{ .compatible = "brcm,bcm2835-usb", .data = dwc2_set_bcm_params },
>  	{ .compatible = "hisilicon,hi6220-usb", .data = dwc2_set_his_params  },
> @@ -133,6 +150,9 @@ const struct of_device_id dwc2_of_match_table[] = {
>  	{ .compatible = "amlogic,meson-gxbb-usb",
>  	  .data = dwc2_set_amlogic_params },
>  	{ .compatible = "amcc,dwc-otg", .data = dwc2_set_amcc_params },
> +	{ .compatible = "st,stm32f4x9-fsotg",
> +	  .data = dwc2_set_stm32f4x9_fsotg_params },
> +	{ .compatible = "st,stm32f4x9-hsotg" },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, dwc2_of_match_table);
>

Re: [PATCH v4 1/5] usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)

[John Youn]

On 1/28/2017 6:21 PM, Bruno Herrera wrote:
> This patch introduces a new parameter to activate USB OTG HS/FS core embedded
> phy transceiver. The STM32F4x9 SoC uses the GGPIO register to enable the transceiver.
> Also add the dwc2_core_params structure for stm32f4 otg fs.
>
> Signed-off-by: Bruno Herrera <bruherrera-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> ---
>  drivers/usb/dwc2/core.h   |  4 ++++
>  drivers/usb/dwc2/hcd.c    | 13 ++++++++++++-
>  drivers/usb/dwc2/hw.h     |  2 ++
>  drivers/usb/dwc2/params.c | 20 ++++++++++++++++++++
>  4 files changed, 38 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index b9b62f1..ed8ce42 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -423,6 +423,9 @@ enum dwc2_ep0_state {
>   *			needed.
>   *			0 - No (default)
>   *			1 - Yes
> + * @activate_transceiver: Activate internal transceiver using GGPIO register.
> + *			0 - Deactivate the transceiver (default)
> + *			1 - Activate the transceiver
>   * @g_dma:              Enables gadget dma usage (default: autodetect).
>   * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).
>   * @g_rx_fifo_size:	The periodic rx fifo size for the device, in
> @@ -477,6 +480,7 @@ struct dwc2_core_params {
>  	bool uframe_sched;
>  	bool external_id_pin_ctl;
>  	bool hibernation;
> +	bool activate_transceiver;

Seeing as this is very specific to the STM FS platform using a GGPIO
register bit that only exists for it, maybe call it something like:

activate_stm_fs_transceiver


>  	u16 max_packet_count;
>  	u32 max_transfer_size;
>  	u32 ahbcfg;
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index a73722e..190a441 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
>
>  static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  {
> -	u32 usbcfg, i2cctl;
> +	u32 usbcfg, ggpio, i2cctl;
>  	int retval = 0;
>
>  	/*
> @@ -145,6 +145,17 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  				return retval;
>  			}
>  		}
> +
> +		ggpio = dwc2_readl(hsotg->regs + GGPIO);
> +		if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN) &&
> +		    (hsotg->params.activate_transceiver > 0)) {

This is bool so no need to check > 0.

> +			dev_dbg(hsotg->dev, "Activating transceiver\n");
> +			/* STM32F4x9 uses the GGPIO register as general core

Use '/*' by itself to start multi-line comments.

> +			 * configuration register.
> +			 */
> +			ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
> +			dwc2_writel(ggpio, hsotg->regs + GGPIO);
> +		}

Make this whole block conditional on the parameter.

>  	}
>
>  	/*
> diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
> index bde7248..9b432c1 100644
> --- a/drivers/usb/dwc2/hw.h
> +++ b/drivers/usb/dwc2/hw.h
> @@ -225,6 +225,8 @@
>
>  #define GPVNDCTL			HSOTG_REG(0x0034)
>  #define GGPIO				HSOTG_REG(0x0038)
> +#define GGPIO_STM32_OTG_GCCFG_PWRDWN	(1 << 16)
> +

Use BIT macro

>  #define GUID				HSOTG_REG(0x003c)
>  #define GSNPSID				HSOTG_REG(0x0040)
>  #define GHWCFG1				HSOTG_REG(0x0044)
> diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
> index 2990c34..a35abba 100644
> --- a/drivers/usb/dwc2/params.c
> +++ b/drivers/usb/dwc2/params.c
> @@ -120,6 +120,23 @@ static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
>  	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
>  }
>
> +static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
> +{
> +	struct dwc2_core_params *p = &hsotg->params;
> +
> +	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
> +	p->speed = DWC2_SPEED_PARAM_FULL;
> +	p->host_rx_fifo_size = 128;
> +	p->host_nperio_tx_fifo_size = 96;
> +	p->host_perio_tx_fifo_size = 96;
> +	p->max_packet_count = 256;
> +	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
> +	p->i2c_enable = false;
> +	p->uframe_sched = false;
> +	p->activate_transceiver = true;
> +

Remove newline

[snip]

Regards,
John
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[PATCH v4 1/5] usb: dwc2: Add support for STM32F429/439/469 USB OTG HS/FS in FS mode (internal PHY)

[John Youn]

On 1/28/2017 6:21 PM, Bruno Herrera wrote:
> This patch introduces a new parameter to activate USB OTG HS/FS core embedded
> phy transceiver. The STM32F4x9 SoC uses the GGPIO register to enable the transceiver.
> Also add the dwc2_core_params structure for stm32f4 otg fs.
>
> Signed-off-by: Bruno Herrera <bruherrera@gmail.com>
> ---
>  drivers/usb/dwc2/core.h   |  4 ++++
>  drivers/usb/dwc2/hcd.c    | 13 ++++++++++++-
>  drivers/usb/dwc2/hw.h     |  2 ++
>  drivers/usb/dwc2/params.c | 20 ++++++++++++++++++++
>  4 files changed, 38 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/usb/dwc2/core.h b/drivers/usb/dwc2/core.h
> index b9b62f1..ed8ce42 100644
> --- a/drivers/usb/dwc2/core.h
> +++ b/drivers/usb/dwc2/core.h
> @@ -423,6 +423,9 @@ enum dwc2_ep0_state {
>   *			needed.
>   *			0 - No (default)
>   *			1 - Yes
> + * @activate_transceiver: Activate internal transceiver using GGPIO register.
> + *			0 - Deactivate the transceiver (default)
> + *			1 - Activate the transceiver
>   * @g_dma:              Enables gadget dma usage (default: autodetect).
>   * @g_dma_desc:         Enables gadget descriptor DMA (default: autodetect).
>   * @g_rx_fifo_size:	The periodic rx fifo size for the device, in
> @@ -477,6 +480,7 @@ struct dwc2_core_params {
>  	bool uframe_sched;
>  	bool external_id_pin_ctl;
>  	bool hibernation;
> +	bool activate_transceiver;

Seeing as this is very specific to the STM FS platform using a GGPIO
register bit that only exists for it, maybe call it something like:

activate_stm_fs_transceiver


>  	u16 max_packet_count;
>  	u32 max_transfer_size;
>  	u32 ahbcfg;
> diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c
> index a73722e..190a441 100644
> --- a/drivers/usb/dwc2/hcd.c
> +++ b/drivers/usb/dwc2/hcd.c
> @@ -121,7 +121,7 @@ static void dwc2_init_fs_ls_pclk_sel(struct dwc2_hsotg *hsotg)
>
>  static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  {
> -	u32 usbcfg, i2cctl;
> +	u32 usbcfg, ggpio, i2cctl;
>  	int retval = 0;
>
>  	/*
> @@ -145,6 +145,17 @@ static int dwc2_fs_phy_init(struct dwc2_hsotg *hsotg, bool select_phy)
>  				return retval;
>  			}
>  		}
> +
> +		ggpio = dwc2_readl(hsotg->regs + GGPIO);
> +		if (!(ggpio & GGPIO_STM32_OTG_GCCFG_PWRDWN) &&
> +		    (hsotg->params.activate_transceiver > 0)) {

This is bool so no need to check > 0.

> +			dev_dbg(hsotg->dev, "Activating transceiver\n");
> +			/* STM32F4x9 uses the GGPIO register as general core

Use '/*' by itself to start multi-line comments.

> +			 * configuration register.
> +			 */
> +			ggpio |= GGPIO_STM32_OTG_GCCFG_PWRDWN;
> +			dwc2_writel(ggpio, hsotg->regs + GGPIO);
> +		}

Make this whole block conditional on the parameter.

>  	}
>
>  	/*
> diff --git a/drivers/usb/dwc2/hw.h b/drivers/usb/dwc2/hw.h
> index bde7248..9b432c1 100644
> --- a/drivers/usb/dwc2/hw.h
> +++ b/drivers/usb/dwc2/hw.h
> @@ -225,6 +225,8 @@
>
>  #define GPVNDCTL			HSOTG_REG(0x0034)
>  #define GGPIO				HSOTG_REG(0x0038)
> +#define GGPIO_STM32_OTG_GCCFG_PWRDWN	(1 << 16)
> +

Use BIT macro

>  #define GUID				HSOTG_REG(0x003c)
>  #define GSNPSID				HSOTG_REG(0x0040)
>  #define GHWCFG1				HSOTG_REG(0x0044)
> diff --git a/drivers/usb/dwc2/params.c b/drivers/usb/dwc2/params.c
> index 2990c34..a35abba 100644
> --- a/drivers/usb/dwc2/params.c
> +++ b/drivers/usb/dwc2/params.c
> @@ -120,6 +120,23 @@ static void dwc2_set_amcc_params(struct dwc2_hsotg *hsotg)
>  	p->ahbcfg = GAHBCFG_HBSTLEN_INCR16 << GAHBCFG_HBSTLEN_SHIFT;
>  }
>
> +static void dwc2_set_stm32f4x9_fsotg_params(struct dwc2_hsotg *hsotg)
> +{
> +	struct dwc2_core_params *p = &hsotg->params;
> +
> +	p->otg_cap = DWC2_CAP_PARAM_NO_HNP_SRP_CAPABLE;
> +	p->speed = DWC2_SPEED_PARAM_FULL;
> +	p->host_rx_fifo_size = 128;
> +	p->host_nperio_tx_fifo_size = 96;
> +	p->host_perio_tx_fifo_size = 96;
> +	p->max_packet_count = 256;
> +	p->phy_type = DWC2_PHY_TYPE_PARAM_FS;
> +	p->i2c_enable = false;
> +	p->uframe_sched = false;
> +	p->activate_transceiver = true;
> +

Remove newline

[snip]

Regards,
John