subdev/fb/ramnv04.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 #include "regsnv04.h"
0026
0027 const struct nvkm_ram_func
0028 nv04_ram_func = {
0029 };
0030
0031 int
0032 nv04_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
0033 {
0034     struct nvkm_device *device = fb->subdev.device;
0035     u32 boot0 = nvkm_rd32(device, NV04_PFB_BOOT_0);
0036     u64 size;
0037     enum nvkm_ram_type type;
0038
0039     if (boot0 & 0x00000100) {
0040         size  = ((boot0 >> 12) & 0xf) * 2 + 2;
0041         size *= 1024 * 1024;
0042     } else {
0043         switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
0044         case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
0045             size = 32 * 1024 * 1024;
0046             break;
0047         case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
0048             size = 16 * 1024 * 1024;
0049             break;
0050         case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
0051             size = 8 * 1024 * 1024;
0052             break;
0053         case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
0054             size = 4 * 1024 * 1024;
0055             break;
0056         }
0057     }
0058
0059     if ((boot0 & 0x00000038) <= 0x10)
0060         type = NVKM_RAM_TYPE_SGRAM;
0061     else
0062         type = NVKM_RAM_TYPE_SDRAM;
0063
0064     return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
0065 }