xref: /OK3568_Linux_fs/kernel/arch/mips/loongson64/vbios_quirk.c (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+
2*4882a593Smuzhiyun 
3*4882a593Smuzhiyun #include <linux/pci.h>
4*4882a593Smuzhiyun #include <loongson.h>
5*4882a593Smuzhiyun 
pci_fixup_radeon(struct pci_dev * pdev)6*4882a593Smuzhiyun static void pci_fixup_radeon(struct pci_dev *pdev)
7*4882a593Smuzhiyun {
8*4882a593Smuzhiyun 	struct resource *res = &pdev->resource[PCI_ROM_RESOURCE];
9*4882a593Smuzhiyun 
10*4882a593Smuzhiyun 	if (res->start)
11*4882a593Smuzhiyun 		return;
12*4882a593Smuzhiyun 
13*4882a593Smuzhiyun 	if (!loongson_sysconf.vgabios_addr)
14*4882a593Smuzhiyun 		return;
15*4882a593Smuzhiyun 
16*4882a593Smuzhiyun 	pci_disable_rom(pdev);
17*4882a593Smuzhiyun 	if (res->parent)
18*4882a593Smuzhiyun 		release_resource(res);
19*4882a593Smuzhiyun 
20*4882a593Smuzhiyun 	res->start = virt_to_phys((void *) loongson_sysconf.vgabios_addr);
21*4882a593Smuzhiyun 	res->end   = res->start + 256*1024 - 1;
22*4882a593Smuzhiyun 	res->flags = IORESOURCE_MEM | IORESOURCE_ROM_SHADOW |
23*4882a593Smuzhiyun 		     IORESOURCE_PCI_FIXED;
24*4882a593Smuzhiyun 
25*4882a593Smuzhiyun 	dev_info(&pdev->dev, "BAR %d: assigned %pR for Radeon ROM\n",
26*4882a593Smuzhiyun 		 PCI_ROM_RESOURCE, res);
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun DECLARE_PCI_FIXUP_CLASS_FINAL(PCI_VENDOR_ID_ATI, 0x9615,
29*4882a593Smuzhiyun 				PCI_CLASS_DISPLAY_VGA, 8, pci_fixup_radeon);
30