subdev/fb/ramnv44.c

0001 /*
0002  * Copyright 2013 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  *
0022  * Authors: Ben Skeggs
0023  */
0024 #include "ramnv40.h"
0025
0026 int
0027 nv44_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
0028 {
0029     struct nvkm_device *device = fb->subdev.device;
0030     u32  size = nvkm_rd32(device, 0x10020c) & 0xff000000;
0031     u32 fb474 = nvkm_rd32(device, 0x100474);
0032     enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
0033
0034     if (fb474 & 0x00000004)
0035         type = NVKM_RAM_TYPE_GDDR3;
0036     if (fb474 & 0x00000002)
0037         type = NVKM_RAM_TYPE_DDR2;
0038     if (fb474 & 0x00000001)
0039         type = NVKM_RAM_TYPE_DDR1;
0040
0041     return nv40_ram_new_(fb, type, size, pram);
0042 }