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 <core/device.h>
26
27static u32
28prom_read(void *data, u32 offset, u32 length, struct nvkm_bios *bios)
29{
30	u32 i;
31	if (offset + length <= 0x00100000) {
32		for (i = offset; i < offset + length; i += 4)
33			*(u32 *)&bios->data[i] = nv_rd32(bios, 0x300000 + i);
34		return length;
35	}
36	return 0;
37}
38
39static void
40prom_fini(void *data)
41{
42	struct nvkm_bios *bios = data;
43	if (nv_device(bios)->card_type < NV_50)
44		nv_mask(bios, 0x001850, 0x00000001, 0x00000001);
45	else
46		nv_mask(bios, 0x088050, 0x00000001, 0x00000001);
47}
48
49static void *
50prom_init(struct nvkm_bios *bios, const char *name)
51{
52	if (nv_device(bios)->card_type < NV_50) {
53		if (nv_device(bios)->card_type == NV_40 &&
54		    nv_device(bios)->chipset >= 0x4c)
55			return ERR_PTR(-ENODEV);
56		nv_mask(bios, 0x001850, 0x00000001, 0x00000000);
57	} else {
58		nv_mask(bios, 0x088050, 0x00000001, 0x00000000);
59	}
60	return bios;
61}
62
63const struct nvbios_source
64nvbios_rom = {
65	.name = "PROM",
66	.init = prom_init,
67	.fini = prom_fini,
68	.read = prom_read,
69	.rw = false,
70};
71