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