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usb: dwc3: omap: use request_threaded_irq()

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We intend to share this interrupt with the OTG driver an to ensure
that irqflags match for the shared interrupt handlers we use
request_threaded_irq()

If we don't use request_treaded_irq() then forced threaded irq will
set IRQF_ONESHOT and this won't match with the OTG IRQ handler's
IRQ flags.

NOTE: OTG IRQ handler is yet to be added. This is a preparatory step.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Roger Quadros 2016-05-11 17:36:42 +03:00 committed by Felipe Balbi
parent 475c8beb35
commit 3f586c92d8
1 changed files with 26 additions and 6 deletions
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32
drivers/usb/dwc3/dwc3-omap.c
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@ -165,7 +165,7 @@ static void dwc3_omap_write_utmi_ctrl(struct dwc3_omap *omap, u32 value)
static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap) static u32 dwc3_omap_read_irq0_status(struct dwc3_omap *omap)
{ {
return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_0 - return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_0 -
omap->irq0_offset); omap->irq0_offset);
} }
@ -178,7 +178,7 @@ static void dwc3_omap_write_irq0_status(struct dwc3_omap *omap, u32 value)
static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap) static u32 dwc3_omap_read_irqmisc_status(struct dwc3_omap *omap)
{ {
return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_MISC + return dwc3_omap_readl(omap->base, USBOTGSS_IRQSTATUS_RAW_MISC +
omap->irqmisc_offset); omap->irqmisc_offset);
} }
@ -268,19 +268,38 @@ static void dwc3_omap_set_mailbox(struct dwc3_omap *omap,
} }
} }
static void dwc3_omap_enable_irqs(struct dwc3_omap *omap);
static void dwc3_omap_disable_irqs(struct dwc3_omap *omap);
static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap) static irqreturn_t dwc3_omap_interrupt(int irq, void *_omap)
{
struct dwc3_omap *omap = _omap;
if (dwc3_omap_read_irqmisc_status(omap) ||
dwc3_omap_read_irq0_status(omap)) {
/* mask irqs */
dwc3_omap_disable_irqs(omap);
return IRQ_WAKE_THREAD;
}
return IRQ_NONE;
}
static irqreturn_t dwc3_omap_interrupt_thread(int irq, void *_omap)
{ {
struct dwc3_omap *omap = _omap; struct dwc3_omap *omap = _omap;
u32 reg; u32 reg;
/* clear irq status flags */
reg = dwc3_omap_read_irqmisc_status(omap); reg = dwc3_omap_read_irqmisc_status(omap);
dwc3_omap_write_irqmisc_status(omap, reg); dwc3_omap_write_irqmisc_status(omap, reg);
reg = dwc3_omap_read_irq0_status(omap); reg = dwc3_omap_read_irq0_status(omap);
dwc3_omap_write_irq0_status(omap, reg); dwc3_omap_write_irq0_status(omap, reg);
/* unmask irqs */
dwc3_omap_enable_irqs(omap);
return IRQ_HANDLED; return IRQ_HANDLED;
} }
@ -497,8 +516,9 @@ static int dwc3_omap_probe(struct platform_device *pdev)
/* check the DMA Status */ /* check the DMA Status */
reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG); reg = dwc3_omap_readl(omap->base, USBOTGSS_SYSCONFIG);
ret = devm_request_irq(dev, omap->irq, dwc3_omap_interrupt, 0, ret = devm_request_threaded_irq(dev, omap->irq, dwc3_omap_interrupt,
"dwc3-omap", omap); dwc3_omap_interrupt_thread, 0,
"dwc3-omap", omap);
if (ret) { if (ret) {
dev_err(dev, "failed to request IRQ #%d --> %d\n", dev_err(dev, "failed to request IRQ #%d --> %d\n",
omap->irq, ret); omap->irq, ret);