123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100 |
- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
- */
- #include <linux/kernel.h>
- #include <linux/export.h>
- #include <linux/init.h>
- #include <linux/acpi.h>
- #include <linux/types.h>
- #include <linux/pci.h>
- #include <linux/vgaarb.h>
- #include <asm/cacheflush.h>
- #include <asm/loongson.h>
- #define PCI_DEVICE_ID_LOONGSON_HOST 0x7a00
- #define PCI_DEVICE_ID_LOONGSON_DC1 0x7a06
- #define PCI_DEVICE_ID_LOONGSON_DC2 0x7a36
- int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
- int reg, int len, u32 *val)
- {
- struct pci_bus *bus_tmp = pci_find_bus(domain, bus);
- if (bus_tmp)
- return bus_tmp->ops->read(bus_tmp, devfn, reg, len, val);
- return -EINVAL;
- }
- int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
- int reg, int len, u32 val)
- {
- struct pci_bus *bus_tmp = pci_find_bus(domain, bus);
- if (bus_tmp)
- return bus_tmp->ops->write(bus_tmp, devfn, reg, len, val);
- return -EINVAL;
- }
- phys_addr_t mcfg_addr_init(int node)
- {
- return (((u64)node << 44) | MCFG_EXT_PCICFG_BASE);
- }
- static int __init pcibios_init(void)
- {
- unsigned int lsize;
- /*
- * Set PCI cacheline size to that of the last level in the
- * cache hierarchy.
- */
- lsize = cpu_last_level_cache_line_size();
- BUG_ON(!lsize);
- pci_dfl_cache_line_size = lsize >> 2;
- pr_debug("PCI: pci_cache_line_size set to %d bytes\n", lsize);
- return 0;
- }
- subsys_initcall(pcibios_init);
- int pcibios_device_add(struct pci_dev *dev)
- {
- int id;
- struct irq_domain *dom;
- id = pci_domain_nr(dev->bus);
- dom = irq_find_matching_fwnode(get_pch_msi_handle(id), DOMAIN_BUS_PCI_MSI);
- dev_set_msi_domain(&dev->dev, dom);
- return 0;
- }
- int pcibios_alloc_irq(struct pci_dev *dev)
- {
- if (acpi_disabled)
- return 0;
- if (pci_dev_msi_enabled(dev))
- return 0;
- return acpi_pci_irq_enable(dev);
- }
- static void pci_fixup_vgadev(struct pci_dev *pdev)
- {
- struct pci_dev *devp = NULL;
- while ((devp = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, devp))) {
- if (devp->vendor != PCI_VENDOR_ID_LOONGSON) {
- vga_set_default_device(devp);
- dev_info(&pdev->dev,
- "Overriding boot device as %X:%X\n",
- devp->vendor, devp->device);
- }
- }
- }
- DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, PCI_DEVICE_ID_LOONGSON_DC1, pci_fixup_vgadev);
- DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_LOONGSON, PCI_DEVICE_ID_LOONGSON_DC2, pci_fixup_vgadev);
|