subdev/fb/ramnv20.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 "ram.h"
0025
0026 int
0027 nv20_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
0028 {
0029     struct nvkm_device *device = fb->subdev.device;
0030     u32 pbus1218 =  nvkm_rd32(device, 0x001218);
0031     u32     size = (nvkm_rd32(device, 0x10020c) & 0xff000000);
0032     enum nvkm_ram_type type = NVKM_RAM_TYPE_UNKNOWN;
0033     int ret;
0034
0035     switch (pbus1218 & 0x00000300) {
0036     case 0x00000000: type = NVKM_RAM_TYPE_SDRAM; break;
0037     case 0x00000100: type = NVKM_RAM_TYPE_DDR1 ; break;
0038     case 0x00000200: type = NVKM_RAM_TYPE_GDDR3; break;
0039     case 0x00000300: type = NVKM_RAM_TYPE_GDDR2; break;
0040     }
0041
0042     ret = nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
0043     if (ret)
0044         return ret;
0045
0046     (*pram)->parts = (nvkm_rd32(device, 0x100200) & 0x00000003) + 1;
0047     return 0;
0048 }