diff mbox series

[V5,4/4] PCI: Add quirk for multifunction devices of LS7A

Message ID 20210629085521.2976352-5-chenhuacai@loongson.cn
State New
Headers show
Series PCI: Loongson-related pci quirks | expand

Commit Message

陈华才 June 29, 2021, 8:55 a.m. UTC 
From: Jianmin Lv <lvjianmin@loongson.cn>

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@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
---
 drivers/pci/quirks.c    | 23 +++++++++++++++++++++++
 include/linux/pci_ids.h | 11 +++++++++++
 2 files changed, 34 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index febc53943051..9dd6cf5358e0 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -263,6 +263,29 @@  DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_LOONGSON,
 			DEV_PCIE_PORT_2, loongson_mrrs_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_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);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			PCI_DEVICE_ID_LOONGSON_AHCI, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			PCI_DEVICE_ID_LOONGSON_EHCI, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			PCI_DEVICE_ID_LOONGSON_OHCI, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			PCI_DEVICE_ID_LOONGSON_DC, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			PCI_DEVICE_ID_LOONGSON_GPU, loongson_pci_pin_quirk);
+DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON,
+			PCI_DEVICE_ID_LOONGSON_GMAC, loongson_pci_pin_quirk);
+
 /*
  * The Mellanox Tavor device gives false positive parity errors.  Disable
  * parity error reporting.
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 4c3fa5293d76..f3d41ae761d8 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -151,6 +151,17 @@ 
 /* Vendors and devices.  Sort key: vendor first, device next. */
 
 #define PCI_VENDOR_ID_LOONGSON		0x0014
+#define PCI_DEVICE_ID_LOONGSON_HOST     0x7a00
+#define PCI_DEVICE_ID_LOONGSON_APB      0x7a02
+#define PCI_DEVICE_ID_LOONGSON_GMAC     0x7a03
+#define PCI_DEVICE_ID_LOONGSON_DC       0x7a06
+#define PCI_DEVICE_ID_LOONGSON_HDA      0x7a07
+#define PCI_DEVICE_ID_LOONGSON_GPU      0x7a15
+#define PCI_DEVICE_ID_LOONGSON_AHCI     0x7a08
+#define PCI_DEVICE_ID_LOONGSON_EHCI     0x7a14
+#define PCI_DEVICE_ID_LOONGSON_OHCI     0x7a24
+#define PCI_DEVICE_ID_LOONGSON_LPC      0x7a0c
+#define PCI_DEVICE_ID_LOONGSON_DMA      0x7a0f
 
 #define PCI_VENDOR_ID_TTTECH		0x0357
 #define PCI_DEVICE_ID_TTTECH_MC322	0x000a