[PATCH V11 6/6] PCI: Add quirk for multifunction devices of LS7A

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From: Jianmin Lv <lvjianmin@xxxxxxxxxxx>

In LS7A, multifunction device use same PCI PIN (because the PIN register
report the same INTx value to each function) but we need different IRQ
for different functions, so add a quirk to fix it for standard PCI PIN
usage.

This patch only affect ACPI based systems (and only needed by ACPI based
systems, too). For DT based systems, the irq mappings is defined in .dts
files and be handled by of_irq_parse_pci().

Signed-off-by: Jianmin Lv <lvjianmin@xxxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
---
 drivers/pci/controller/pci-loongson.c | 29 +++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/drivers/pci/controller/pci-loongson.c b/drivers/pci/controller/pci-loongson.c
index 5780b5db3dc1..bffddfb3cee8 100644
--- a/drivers/pci/controller/pci-loongson.c
+++ b/drivers/pci/controller/pci-loongson.c
@@ -22,6 +22,12 @@
 #define DEV_LS2K_APB	0x7a02
 #define DEV_LS7A_CONF	0x7a10
 #define DEV_LS7A_LPC	0x7a0c
+#define DEV_LS7A_GMAC	0x7a03
+#define DEV_LS7A_DC	0x7a06
+#define DEV_LS7A_GPU	0x7a15
+#define DEV_LS7A_AHCI	0x7a08
+#define DEV_LS7A_EHCI	0x7a14
+#define DEV_LS7A_OHCI	0x7a24
 
 #define FLAG_CFG0	BIT(0)
 #define FLAG_CFG1	BIT(1)
@@ -108,6 +114,29 @@ DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 			DEV_PCIE_PORT_2, loongson_bmaster_quirk);
 
+static void loongson_pci_pin_quirk(struct pci_dev *pdev)
+{
+	pdev->pin = 1 + (PCI_FUNC(pdev->devfn) & 3);
+}
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_LS7A_DC, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_LS7A_GPU, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_LS7A_GMAC, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_LS7A_AHCI, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_LS7A_EHCI, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_LS7A_OHCI, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_PCIE_PORT_0, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_PCIE_PORT_1, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			DEV_PCIE_PORT_2, loongson_pci_pin_quirk);
+
 static struct loongson_pci *pci_bus_to_loongson_pci(struct pci_bus *bus)
 {
 	struct pci_config_window *cfg;
-- 
2.27.0




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