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1 | /* | |
2 | * Copyright 2013 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 | * Authors: Ben Skeggs | |
23 | */ | |
24 | #include "ram.h" | |
25 | ||
26 | int | |
27 | nv20_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram) | |
28 | { | |
29 | struct nvkm_device *device = fb->subdev.device; | |
30 | u32 pbus1218 = nvkm_rd32(device, 0x001218); | |
31 | u32 size = (nvkm_rd32(device, 0x10020c) & 0xff000000); | |
32 | enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN; | |
33 | int ret; | |
34 | ||
35 | switch (pbus1218 & 0x00000300) { | |
36 | case 0x00000000: type = NVKM_RAM_TYPE_SDRAM; break; | |
37 | case 0x00000100: type = NVKM_RAM_TYPE_DDR1 ; break; | |
38 | case 0x00000200: type = NVKM_RAM_TYPE_GDDR3; break; | |
39 | case 0x00000300: type = NVKM_RAM_TYPE_GDDR2; break; | |
40 | } | |
41 | ||
42 | ret = nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram); | |
43 | if (ret) | |
44 | return ret; | |
45 | ||
46 | (*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1; | |
47 | return 0; | |
48 | } |