| Message ID | 1444388979-12072-4-git-send-email-siarhei.siamashka@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Fri, Oct 09, 2015 at 02:09:39PM +0300, Siarhei Siamashka wrote: > Enable the otg/drc usb controller on the pcDuino1/2 board. Note > that the pcDuino1 FEX file from the vendor contains the following > information in the [usbc0] section: > usb_id_gpio = port:PH04<0><1><default><default> > usb_det_vbus_gpio = port:PH05<0><0><default><default> > usb_drv_vbus_gpio = port:PB09<1><0><default><0> > While the pcDuino2 FEX has: > usb_id_gpio = port:PH04<0><1><default><default> > usb_det_vbus_gpio = port:PH05<0><0><default><default> > usb_drv_vbus_gpio = port:PD02<1><0><default><0> > > The ID pin is indeed PH4. The PD2 pin can be used to switch power > on/off for the USB Type A receptacle on pcDuino2, but it has nothing > to do with the MicroUSB OTG receptacle. The VBUS pin of the MicroUSB > receptacle is always connected to 5V according to the schematics > (both pcDuino1 and pcDuino2) and confirmed by doing some tests on > pcDuino2. The PH5 pin is just one of the pins on the J8 expansion > header and has nothing to do with USB OTG. The PB9 pin is pulled > up and connected to the N_VBUSEN pin of AXP209 PMIC, while the > VBUS pin of AXP209 only has a capacitor between it and the > ground (this pin is not used for anything else). > > To sum it up. Only the ID pin (PH4) has a real use. And 5V voltage > is always served to the MicroUSB OTG receptacle no matter what is > the state of the PB9/PD2 pins. > > This patch has been tested on pcDuino2 to work fine in a host role > with a USB keyboard connected via an OTG cable. It also works fine > in a device role (cdc_ether) with a regular Micro-B cable connected > to a desktop PC. > > Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> Applied, thanks! Maxime
diff --git a/arch/arm/boot/dts/sun4i-a10-pcduino.dts b/arch/arm/boot/dts/sun4i-a10-pcduino.dts index 0b45d27..39034aa 100644 --- a/arch/arm/boot/dts/sun4i-a10-pcduino.dts +++ b/arch/arm/boot/dts/sun4i-a10-pcduino.dts @@ -164,6 +164,10 @@ status = "okay"; }; +&otg_sram { + status = "okay"; +}; + &pio { led_pins_pcduino: led_pins@0 { allwinner,pins = "PH15", "PH16"; @@ -178,6 +182,13 @@ allwinner,drive = <SUN4I_PINCTRL_10_MA>; allwinner,pull = <SUN4I_PINCTRL_NO_PULL>; }; + + usb0_id_detect_pin: usb0_id_detect_pin@0 { + allwinner,pins = "PH4"; + allwinner,function = "gpio_in"; + allwinner,drive = <SUN4I_PINCTRL_10_MA>; + allwinner,pull = <SUN4I_PINCTRL_PULL_UP>; + }; }; #include "axp209.dtsi" @@ -213,7 +224,15 @@ status = "okay"; }; +&usb_otg { + dr_mode = "otg"; + status = "okay"; +}; + &usbphy { + pinctrl-names = "default"; + pinctrl-0 = <&usb0_id_detect_pin>; + usb0_id_det-gpio = <&pio 7 4 GPIO_ACTIVE_HIGH>; /* PH4 */ usb1_vbus-supply = <®_vcc5v0>; /* USB1 VBUS is always on */ usb2_vbus-supply = <®_vcc5v0>; /* USB2 VBUS is always on */ status = "okay";
Enable the otg/drc usb controller on the pcDuino1/2 board. Note that the pcDuino1 FEX file from the vendor contains the following information in the [usbc0] section: usb_id_gpio = port:PH04<0><1><default><default> usb_det_vbus_gpio = port:PH05<0><0><default><default> usb_drv_vbus_gpio = port:PB09<1><0><default><0> While the pcDuino2 FEX has: usb_id_gpio = port:PH04<0><1><default><default> usb_det_vbus_gpio = port:PH05<0><0><default><default> usb_drv_vbus_gpio = port:PD02<1><0><default><0> The ID pin is indeed PH4. The PD2 pin can be used to switch power on/off for the USB Type A receptacle on pcDuino2, but it has nothing to do with the MicroUSB OTG receptacle. The VBUS pin of the MicroUSB receptacle is always connected to 5V according to the schematics (both pcDuino1 and pcDuino2) and confirmed by doing some tests on pcDuino2. The PH5 pin is just one of the pins on the J8 expansion header and has nothing to do with USB OTG. The PB9 pin is pulled up and connected to the N_VBUSEN pin of AXP209 PMIC, while the VBUS pin of AXP209 only has a capacitor between it and the ground (this pin is not used for anything else). To sum it up. Only the ID pin (PH4) has a real use. And 5V voltage is always served to the MicroUSB OTG receptacle no matter what is the state of the PB9/PD2 pins. This patch has been tested on pcDuino2 to work fine in a host role with a USB keyboard connected via an OTG cable. It also works fine in a device role (cdc_ether) with a regular Micro-B cable connected to a desktop PC. Signed-off-by: Siarhei Siamashka <siarhei.siamashka@gmail.com> --- arch/arm/boot/dts/sun4i-a10-pcduino.dts | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+)