ramnv20.c (1855B)
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 26int 27nv20_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}