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usb: dwc2: Implement set_selfpowered()

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dwc2 always reports as self-powered in response to a device status
request.  Implement the set_selfpowered() operations so that the gadget
can report as bus-powered when appropriate.

This is modelled on the dwc3 implementation.

Acked-by: Minas Harutyunyan <hminas@synopsys.com>
Signed-off-by: John Keeping <john@metanate.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
John Keeping 2020-02-04 15:29:33 +00:00 committed by Felipe Balbi
parent 201c26c08d
commit 1a0808cb9e
1 changed files with 23 additions and 1 deletions
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24
drivers/usb/dwc2/gadget.c
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@ -1646,7 +1646,8 @@ static int dwc2_hsotg_process_req_status(struct dwc2_hsotg *hsotg,
switch (ctrl->bRequestType & USB_RECIP_MASK) {
case USB_RECIP_DEVICE:
status = 1 << USB_DEVICE_SELF_POWERED;
status = hsotg->gadget.is_selfpowered <<
USB_DEVICE_SELF_POWERED;
status |= hsotg->remote_wakeup_allowed <<
USB_DEVICE_REMOTE_WAKEUP;
reply = cpu_to_le16(status);
@ -4527,6 +4528,26 @@ static int dwc2_hsotg_gadget_getframe(struct usb_gadget *gadget)
return dwc2_hsotg_read_frameno(to_hsotg(gadget));
}
/**
* dwc2_hsotg_set_selfpowered - set if device is self/bus powered
* @gadget: The usb gadget state
* @is_selfpowered: Whether the device is self-powered
*
* Set if the device is self or bus powered.
*/
static int dwc2_hsotg_set_selfpowered(struct usb_gadget *gadget,
int is_selfpowered)
{
struct dwc2_hsotg *hsotg = to_hsotg(gadget);
unsigned long flags;
spin_lock_irqsave(&hsotg->lock, flags);
gadget->is_selfpowered = !!is_selfpowered;
spin_unlock_irqrestore(&hsotg->lock, flags);
return 0;
}
/**
* dwc2_hsotg_pullup - connect/disconnect the USB PHY
* @gadget: The usb gadget state
@ -4618,6 +4639,7 @@ static int dwc2_hsotg_vbus_draw(struct usb_gadget *gadget, unsigned int mA)
static const struct usb_gadget_ops dwc2_hsotg_gadget_ops = {
.get_frame = dwc2_hsotg_gadget_getframe,
.set_selfpowered = dwc2_hsotg_set_selfpowered,
.udc_start = dwc2_hsotg_udc_start,
.udc_stop = dwc2_hsotg_udc_stop,
.pullup = dwc2_hsotg_pullup,