Hi,
Roger Quadros <rogerq@xxxxxx> writes:
> Implementations might use different IRQs for
> host, gadget and OTG so use named interrupt resources
> to allow Device tree to specify the 3 interrupts.
>
> Following are the interrupt names
>
> Peripheral Interrupt - peripheral
> HOST Interrupt - host
> OTG Interrupt - otg
>
> We still maintain backward compatibility for a single named
> interrupt for all 3 interrupts (e.g. for dwc3-pci) and
> single unnamed interrupt for all 3 interrupts (e.g. old DT).
cool :-)
> @@ -748,6 +750,20 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
> }
> break;
> case USB_DR_MODE_OTG:
> + dwc->otg_irq = platform_get_irq_byname(dwc3_pdev, "otg");
> + if (dwc->otg_irq <= 0) {
> + dwc->otg_irq = platform_get_irq_byname(dwc3_pdev,
> + "dwc_usb3");
> + if (dwc->otg_irq <= 0) {
> + res = platform_get_resource(dwc3_pdev,
> + IORESOURCE_IRQ, 0);
> + if (!res) {
> + dev_err(dwc->dev, "missing otg IRQ\n");
> + return -ENODEV;
> + }
> + dwc->otg_irq = res->start;
> + }
> + }
I suppose this part can be removed and added only when OTG is
supported. Then dwc3_otg_init() (or whatever) can do this.
> diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
> index 186a886..2e20892 100644
> --- a/drivers/usb/dwc3/core.h
> +++ b/drivers/usb/dwc3/core.h
> @@ -716,6 +716,8 @@ struct dwc3_scratchpad_array {
> * @maximum_speed: maximum speed requested (mainly for testing purposes)
> * @revision: revision register contents
> * @dr_mode: requested mode of operation
> + * @gadget_irq: IRQ number for Peripheral IRQs
> + * @otg_irq: IRQ number for OTG IRQs
> * @usb2_phy: pointer to USB2 PHY
> * @usb3_phy: pointer to USB3 PHY
> * @usb2_generic_phy: pointer to USB2 PHY
> @@ -817,6 +819,9 @@ struct dwc3 {
>
> enum usb_dr_mode dr_mode;
>
> + int gadget_irq;
> + int otg_irq;
while at that, let's add host_irq too and do proper changes to dwc3/host.c
> diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
> index c3b0d01..8db8d13 100644
> --- a/drivers/usb/dwc3/gadget.c
> +++ b/drivers/usb/dwc3/gadget.c
> @@ -1605,7 +1605,7 @@ static int dwc3_gadget_start(struct usb_gadget *g,
> int irq;
> u32 reg;
>
> - irq = platform_get_irq(to_platform_device(dwc->dev), 0);
> + irq = dwc->gadget_irq;
> ret = request_threaded_irq(irq, dwc3_interrupt, dwc3_thread_interrupt,
> IRQF_SHARED, "dwc3", dwc->ev_buf);
> if (ret) {
> @@ -2781,6 +2781,23 @@ static irqreturn_t dwc3_interrupt(int irq, void *_evt)
> int dwc3_gadget_init(struct dwc3 *dwc)
> {
> int ret;
> + struct resource *res;
> + struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
> +
> + dwc->gadget_irq = platform_get_irq_byname(dwc3_pdev, "peripheral");
> + if (dwc->gadget_irq <= 0) {
> + dwc->gadget_irq = platform_get_irq_byname(dwc3_pdev,
> + "dwc_usb3");
> + if (dwc->gadget_irq <= 0) {
> + res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ,
> + 0);
> + if (!res) {
> + dev_err(dwc->dev, "missing peripheral IRQ\n");
> + return -ENODEV;
> + }
> + dwc->gadget_irq = res->start;
> + }
> + }
>
> dwc->ctrl_req = dma_alloc_coherent(dwc->dev, sizeof(*dwc->ctrl_req),
> &dwc->ctrl_req_addr, GFP_KERNEL);
you're regressing dwc3_gadget_stop().
--
balbi
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