From: SangeethaRao <sangeetha....@lsi.com>
This support expects kernel module to handle the doorbell
interrupt.
Signed-off-by: SangeethaRao <sangeetha....@lsi.com>
---
arch/arm/mach-axxia/pci.c | 44 +++++++++++++++-----------------------------
1 file changed, 15 insertions(+), 29 deletions(-)
diff --git a/arch/arm/mach-axxia/pci.c b/arch/arm/mach-axxia/pci.c
index aaa966b..f85b047 100644
--- a/arch/arm/mach-axxia/pci.c
+++ b/arch/arm/mach-axxia/pci.c
@@ -399,46 +399,31 @@ static struct pci_ops axxia_pciex_pci_ops = {
.write = arm_pciex_axxia_write_config,
};
-/* RootComplex Doorbell Handler */
-void doorbell_rc_handler()
-{
- pr_info("doorbell_rc_handler\n");
-}
-EXPORT_SYMBOL(doorbell_rc_handler);
-
-/* EndPoint Doorbell Handler */
-void doorbell_ep_handler()
-{
- pr_info("doorbell_ep_handler\n");
-}
-EXPORT_SYMBOL(doorbell_ep_handler);
-
/*
* pcie_doorbell_isr
*
* This ISR is for doorbell interrupts for
* Endpoint mode which has a dedicated IRQ line
+ * This support expects kernel module to handle the doorbell
+ * interrupt
*/
static irqreturn_t
pcie_doorbell_isr(int irq, void *arg)
{
struct axxia_pciex_port *port = arg;
void __iomem *mbase = port->regs;
- u32 intr1_status;
- irqreturn_t retval = IRQ_HANDLED;
+ u32 intr1_status;
- /* read the PEI interrupt status register */
intr1_status = readl(mbase + PCIE_INT1_STATUS);
if (intr1_status & INT1_DOORBELL) {
- pr_info("PCIE%d: Doorbell interrupt\n",
- port->index);
- doorbell_ep_handler();
- /* clear the doorbell status */
- writel(intr1_status, port->regs + PCIE_INT1_STATUS);
+ /* EP doorbell interrupt. This support expects kernel module
+ * to handle this doorbell interrupt
+ */
+ /* Clear it */
+ writel(INT1_DOORBELL, mbase + PCIE_INT1_STATUS);
}
-
- return retval;
+ return IRQ_NONE;
}
@@ -517,11 +502,12 @@ pcie_legacy_isr(int irq, void *arg)
}
if (intr1_status & INT1_DOORBELL) {
- pr_info("PCIE%d: Doorbell interrupt\n",
- port->index);
- doorbell_rc_handler();
- /* clear the doorbell status */
- writel(intr1_status, port->regs + PCIE_INT1_STATUS);
+ /* RC doorbell interrupt. This support expects kernel module
+ * to handle this doorbell interrupt
+ */
+ /* Clear it */
+ writel(INT1_DOORBELL, mbase + PCIE_INT1_STATUS);
+ return IRQ_NONE;
}
/*
--
1.8.1.4
--
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