usb: dwc3: dwc3-omap: Fix disable IRQ

In the wrapper the IRQ disable should be done by writing 1's to the
IRQ*_CLR register. Existing code is broken because it instead writes
zeros to IRQ*_SET register.

Fix this by adding functions dwc3_omap_write_irqmisc_clr() and
dwc3_omap_write_irq0_clr() which do the right thing.

Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver")
Cc: <stable@vger.kernel.org> # v3.2+
Signed-off-by: George Cherian <george.cherian@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index 172d64e..52e0c4e 100644 (file)
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -205,6 +205,18 @@ static void dwc3_omap_write_irq0_set(struct dwc3_omap *omap, u32 value)
                                                omap->irq0_offset, value);
 }
 
+static void dwc3_omap_write_irqmisc_clr(struct dwc3_omap *omap, u32 value)
+{
+       dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_MISC +
+                                               omap->irqmisc_offset, value);
+}
+
+static void dwc3_omap_write_irq0_clr(struct dwc3_omap *omap, u32 value)
+{
+       dwc3_omap_writel(omap->base, USBOTGSS_IRQENABLE_CLR_0 -
+                                               omap->irq0_offset, value);
+}
+
 static void dwc3_omap_set_mailbox(struct dwc3_omap *omap,
        enum omap_dwc3_vbus_id_status status)
 {
@@ -345,9 +357,23 @@ static void dwc3_omap_enable_irqs(struct dwc3_omap *omap)
 
 static void dwc3_omap_disable_irqs(struct dwc3_omap *omap)
 {
+       u32                     reg;
+
        /* disable all IRQs */
-       dwc3_omap_write_irqmisc_set(omap, 0x00);
-       dwc3_omap_write_irq0_set(omap, 0x00);
+       reg = USBOTGSS_IRQO_COREIRQ_ST;
+       dwc3_omap_write_irq0_clr(omap, reg);
+
+       reg = (USBOTGSS_IRQMISC_OEVT |
+                       USBOTGSS_IRQMISC_DRVVBUS_RISE |
+                       USBOTGSS_IRQMISC_CHRGVBUS_RISE |
+                       USBOTGSS_IRQMISC_DISCHRGVBUS_RISE |
+                       USBOTGSS_IRQMISC_IDPULLUP_RISE |
+                       USBOTGSS_IRQMISC_DRVVBUS_FALL |
+                       USBOTGSS_IRQMISC_CHRGVBUS_FALL |
+                       USBOTGSS_IRQMISC_DISCHRGVBUS_FALL |
+                       USBOTGSS_IRQMISC_IDPULLUP_FALL);
+
+       dwc3_omap_write_irqmisc_clr(omap, reg);
 }
 
 static u64 dwc3_omap_dma_mask = DMA_BIT_MASK(32);