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
27static u32
28nvbios_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
40static void
41nvbios_prom_fini(void *data)
42{
43	struct nvkm_device *device = data;
44	nvkm_pci_rom_shadow(device->pci, true);
45}
46
47static void *
48nvbios_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
57const struct nvbios_source
58nvbios_prom = {
59	.name = "PROM",
60	.init = nvbios_prom_init,
61	.fini = nvbios_prom_fini,
62	.read = nvbios_prom_read,
63	.rw = false,
64};
65