#define HSU_PCI_CHAN_OFFSET 0x100
+#define PCI_DEVICE_ID_INTEL_MFLD_HSU_DMA 0x081e
+#define PCI_DEVICE_ID_INTEL_MRFLD_HSU_DMA 0x1192
+
static irqreturn_t hsu_pci_irq(int irq, void *dev)
{
struct hsu_dma_chip *chip = dev;
+ struct pci_dev *pdev = to_pci_dev(chip->dev);
u32 dmaisr;
u32 status;
unsigned short i;
int ret = 0;
int err;
+ /*
+ * On Intel Tangier B0 and Anniedale the interrupt line, disregarding
+ * to have different numbers, is shared between HSU DMA and UART IPs.
+ * Thus on such SoCs we are expecting that IRQ handler is called in
+ * UART driver only.
+ */
+ if (pdev->device == PCI_DEVICE_ID_INTEL_MRFLD_HSU_DMA)
+ return IRQ_HANDLED;
+
dmaisr = readl(chip->regs + HSU_PCI_DMAISR);
for (i = 0; i < chip->hsu->nr_channels; i++) {
if (dmaisr & 0x1) {
}
static const struct pci_device_id hsu_pci_id_table[] = {
- { PCI_VDEVICE(INTEL, 0x081e), 0 },
- { PCI_VDEVICE(INTEL, 0x1192), 0 },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_MFLD_HSU_DMA), 0 },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_MRFLD_HSU_DMA), 0 },
{ }
};
MODULE_DEVICE_TABLE(pci, hsu_pci_id_table);
return 0;
}
+static int tng_handle_irq(struct uart_port *p)
+{
+ struct mid8250 *mid = p->private_data;
+ struct uart_8250_port *up = up_to_u8250p(p);
+ struct hsu_dma_chip *chip;
+ u32 status;
+ int ret = 0;
+ int err;
+
+ chip = pci_get_drvdata(mid->dma_dev);
+
+ /* Rx DMA */
+ err = hsu_dma_get_status(chip, mid->dma_index * 2 + 1, &status);
+ if (err > 0) {
+ serial8250_rx_dma_flush(up);
+ ret |= 1;
+ } else if (err == 0)
+ ret |= hsu_dma_do_irq(chip, mid->dma_index * 2 + 1, status);
+
+ /* Tx DMA */
+ err = hsu_dma_get_status(chip, mid->dma_index * 2, &status);
+ if (err > 0)
+ ret |= 1;
+ else if (err == 0)
+ ret |= hsu_dma_do_irq(chip, mid->dma_index * 2, status);
+
+ /* UART */
+ ret |= serial8250_handle_irq(p, serial_port_in(p, UART_IIR));
+ return IRQ_RETVAL(ret);
+}
+
static int tng_setup(struct mid8250 *mid, struct uart_port *p)
{
struct pci_dev *pdev = to_pci_dev(p->dev);
mid->dma_index = index;
mid->dma_dev = pci_get_slot(pdev->bus, PCI_DEVFN(5, 0));
+
+ p->handle_irq = tng_handle_irq;
return 0;
}