vbios_quirk.c

 1// SPDX-License-Identifier: GPL-2.0+
 2
 3#include <linux/pci.h>
 4#include <loongson.h>
 5
 6static void pci_fixup_video(struct pci_dev *pdev)
 7{
 8	struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
 9
10	if (res->start)
11		return;
12
13	if (!loongson_sysconf.vgabios_addr)
14		return;
15
16	pci_disable_rom(pdev);
17	if (res->parent)
18		release_resource(res);
19
20	res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr);
21	res->end   = res->start + 256*1024 - 1;
22	res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
23		     IORESOURCE_PCI_FIXED;
24
25	dev_info(&pdev->dev, "Video device with shadowed ROM at %pR\n", res);
26}
27DECLARE_PCI_FIXUP_CLASS_HEADER(PCI_VENDOR_ID_ATI, 0x9615,
28			       PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_video);