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Message-ID: <1460374506-9779-6-git-send-email-rogerq@ti.com>
Date: Mon, 11 Apr 2016 14:35:01 +0300
From: Roger Quadros <rogerq@...com>
To: <balbi@...nel.org>
CC: <tony@...mide.com>, <Joao.Pinto@...opsys.com>,
<sergei.shtylyov@...entembedded.com>, <peter.chen@...escale.com>,
<jun.li@...escale.com>, <grygorii.strashko@...com>,
<yoshihiro.shimoda.uh@...esas.com>, <nsekhar@...com>,
<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-omap@...r.kernel.org>, Roger Quadros <rogerq@...com>
Subject: [PATCH v6 05/10] usb: dwc3: core: cleanup IRQ resources
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).
Signed-off-by: Roger Quadros <rogerq@...com>
---
drivers/usb/dwc3/core.c | 26 ++++++++++++++++----------
drivers/usb/dwc3/core.h | 5 +++++
drivers/usb/dwc3/gadget.c | 19 ++++++++++++++++++-
drivers/usb/dwc3/host.c | 19 +++++++++++++++++++
4 files changed, 58 insertions(+), 11 deletions(-)
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index 17fd8144..1c754749 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -746,6 +746,8 @@ static int dwc3_core_init_mode(struct dwc3 *dwc)
{
struct device *dev = dwc->dev;
int ret;
+ struct resource *res;
+ struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
switch (dwc->dr_mode) {
case USB_DR_MODE_PERIPHERAL:
@@ -765,6 +767,20 @@ 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;
+ }
+ }
dwc3_set_mode(dwc, DWC3_GCTL_PRTCAP_OTG);
ret = dwc3_host_init(dwc);
if (ret) {
@@ -831,16 +847,6 @@ static int dwc3_probe(struct platform_device *pdev)
dwc->mem = mem;
dwc->dev = dev;
- res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
- if (!res) {
- dev_err(dev, "missing IRQ\n");
- return -ENODEV;
- }
- dwc->xhci_resources[1].start = res->start;
- dwc->xhci_resources[1].end = res->end;
- dwc->xhci_resources[1].flags = res->flags;
- dwc->xhci_resources[1].name = res->name;
-
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "missing memory resource\n");
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 81039f7..79422dd 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -754,6 +754,8 @@ 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
@@ -857,6 +859,9 @@ struct dwc3 {
enum usb_dr_mode dr_mode;
+ int gadget_irq;
+ int otg_irq;
+
/* used for suspend/resume */
u32 dcfg;
u32 gctl;
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 3ac170f..90f514c 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1617,7 +1617,7 @@ 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);
if (ret) {
@@ -2795,6 +2795,23 @@ static irqreturn_t dwc3_interrupt(int irq, void *_dwc)
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);
diff --git a/drivers/usb/dwc3/host.c b/drivers/usb/dwc3/host.c
index c679f63..f2b60a4 100644
--- a/drivers/usb/dwc3/host.c
+++ b/drivers/usb/dwc3/host.c
@@ -25,6 +25,25 @@ int dwc3_host_init(struct dwc3 *dwc)
struct platform_device *xhci;
struct usb_xhci_pdata pdata;
int ret;
+ struct resource *res;
+ struct platform_device *dwc3_pdev = to_platform_device(dwc->dev);
+
+ res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ, "host");
+ if (!res) {
+ res = platform_get_resource_byname(dwc3_pdev, IORESOURCE_IRQ,
+ "dwc_usb3");
+ if (!res) {
+ res = platform_get_resource(dwc3_pdev, IORESOURCE_IRQ,
+ 0);
+ if (!res)
+ return -ENOMEM;
+ }
+ }
+
+ dwc->xhci_resources[1].start = res->start;
+ dwc->xhci_resources[1].end = res->end;
+ dwc->xhci_resources[1].flags = res->flags;
+ dwc->xhci_resources[1].name = res->name;
xhci = platform_device_alloc("xhci-hcd", PLATFORM_DEVID_AUTO);
if (!xhci) {
--
2.5.0
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