1 /* $NetBSD: nouveau_nvkm_subdev_fb_ramnv20.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $ */
2
3 /*
4 * Copyright 2013 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: Ben Skeggs
25 */
26 #include <sys/cdefs.h>
27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_ramnv20.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
28
29 #include "ram.h"
30
31 int
nv20_ram_new(struct nvkm_fb * fb,struct nvkm_ram ** pram)32 nv20_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
33 {
34 struct nvkm_device *device = fb->subdev.device;
35 u32 pbus1218 = nvkm_rd32(device, 0x001218);
36 u32 size = (nvkm_rd32(device, 0x10020c) & 0xff000000);
37 enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
38 int ret;
39
40 switch (pbus1218 & 0x00000300) {
41 case 0x00000000: type = NVKM_RAM_TYPE_SDRAM; break;
42 case 0x00000100: type = NVKM_RAM_TYPE_DDR1 ; break;
43 case 0x00000200: type = NVKM_RAM_TYPE_GDDR3; break;
44 case 0x00000300: type = NVKM_RAM_TYPE_GDDR2; break;
45 }
46
47 ret = nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
48 if (ret)
49 return ret;
50
51 (*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1;
52 return 0;
53 }
54