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usb: dwc2: Add function for session B check

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Add a new function to check the session B validity, to be use to check
cable connection.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
This commit is contained in:
Patrick Delaunay 2019-03-29 15:42:18 +01:00 committed by Marek Vasut
parent 0fdd0bc621
commit 2d76160f04
2 changed files with 11 additions and 0 deletions
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9
drivers/usb/gadget/dwc2_udc_otg.c
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@ -1151,4 +1151,13 @@ U_BOOT_DRIVER(dwc2_udc_otg) = {
.platdata_auto_alloc_size = sizeof(struct dwc2_plat_otg_data),
.priv_auto_alloc_size = sizeof(struct dwc2_priv_data),
};
int dwc2_udc_B_session_valid(struct udevice *dev)
{
struct dwc2_plat_otg_data *platdata = dev_get_platdata(dev);
struct dwc2_usbotg_reg *usbotg_reg =
(struct dwc2_usbotg_reg *)platdata->regs_otg;
return readl(&usbotg_reg->gotgctl) & B_SESSION_VALID;
}
#endif /* CONFIG_IS_ENABLED(DM_USB_GADGET) */

2
include/usb/dwc2_udc.h
View File

@ -27,4 +27,6 @@ struct dwc2_plat_otg_data {
int dwc2_udc_probe(struct dwc2_plat_otg_data *pdata);
int dwc2_udc_B_session_valid(struct udevice *dev);
#endif /* __DWC2_USB_GADGET */