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
nv20_ram_new(struct nvkm_fb * fb,struct nvkm_ram ** pram)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 }
49