diff options
| author | Mattijs Korpershoek <mkorpershoek@baylibre.com> | 2023-01-11 09:19:27 +0100 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2023-01-14 14:10:30 +0100 |
| commit | 2383e8f4aec7a5087526d501478c4ba8235da2b4 (patch) | |
| tree | f1746b715fc024bbc76d9197c89bc9a3e0dab193 | |
| parent | 66b5847b30a94487b6a540736dc4b10422d71294 (diff) | |
| download | u-boot-2383e8f4aec7a5087526d501478c4ba8235da2b4.tar.gz | |
usb: gadget: dwc2_udc_otg: implement pullup()
Pullup is used by the usb framework in order to do software-controlled
usb_gadget_connect() and usb_gadget_disconnect().
Implement pullup() for dwc2 using the SOFT_DISCONNECT bit in the dctl
register:
* when pullup is on, clear SOFT_DISCONNECT
* when pullup is off, set SOFT_DISCONNECT
This is especially useful when a gadget disconnection is initiated but
no board_usb_cleanup() is called.
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
| -rw-r--r-- | drivers/usb/gadget/dwc2_udc_otg.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/gadget/dwc2_udc_otg.c b/drivers/usb/gadget/dwc2_udc_otg.c index 77988f78ab..2bf7ed8d60 100644 --- a/drivers/usb/gadget/dwc2_udc_otg.c +++ b/drivers/usb/gadget/dwc2_udc_otg.c @@ -236,6 +236,14 @@ static int udc_enable(struct dwc2_udc *dev) return 0; } +static int dwc2_gadget_pullup(struct usb_gadget *g, int is_on) +{ + clrsetbits_le32(®->dctl, SOFT_DISCONNECT, + is_on ? 0 : SOFT_DISCONNECT); + + return 0; +} + #if !CONFIG_IS_ENABLED(DM_USB_GADGET) /* Register entry point for the peripheral controller driver. @@ -805,6 +813,7 @@ static void dwc2_fifo_flush(struct usb_ep *_ep) } static const struct usb_gadget_ops dwc2_udc_ops = { + .pullup = dwc2_gadget_pullup, /* current versions must always be self-powered */ #if CONFIG_IS_ENABLED(DM_USB_GADGET) .udc_start = dwc2_gadget_start, |