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