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