1 /*
2  * Copyright 2012 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  */
23 #include "priv.h"
24 
25 #include <subdev/pci.h>
26 
27 static u32
28 prom_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
29 {
30 	struct nvkm_device *device = data;
31 	u32 i;
32 	if (offset + length <= 0x00100000) {
33 		for (i = offset; i < offset + length; i += 4)
34 			*(u32 *)&bios->data[i] = nvkm_rd32(device, 0x300000 + i);
35 		return length;
36 	}
37 	return 0;
38 }
39 
40 static void
41 prom_fini(void *data)
42 {
43 	struct nvkm_device *device = data;
44 	nvkm_pci_rom_shadow(device->pci, true);
45 }
46 
47 static void *
48 prom_init(struct nvkm_bios *bios, const char *name)
49 {
50 	struct nvkm_device *device = bios->subdev.device;
51 	if (device->card_type == NV_40 && device->chipset >= 0x4c)
52 		return ERR_PTR(-ENODEV);
53 	nvkm_pci_rom_shadow(device->pci, false);
54 	return device;
55 }
56 
57 const struct nvbios_source
58 nvbios_rom = {
59 	.name = "PROM",
60 	.init = prom_init,
61 	.fini = prom_fini,
62 	.read = prom_read,
63 	.rw = false,
64 };
65