subdev/bios/pcir.c

0001 /*
0002  * Copyright 2014 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 <bskeggs@redhat.com>
0023  */
0024 #include <subdev/bios.h>
0025 #include <subdev/bios/pcir.h>
0026
0027 u32
0028 nvbios_pcirTe(struct nvkm_bios *bios, u32 base, u8 *ver, u16 *hdr)
0029 {
0030     u32 data = nvbios_rd16(bios, base + 0x18);
0031     if (data) {
0032         data += base;
0033         switch (nvbios_rd32(bios, data + 0x00)) {
0034         case 0x52494350: /* PCIR */
0035         case 0x53494752: /* RGIS */
0036         case 0x5344504e: /* NPDS */
0037             *hdr = nvbios_rd16(bios, data + 0x0a);
0038             *ver = nvbios_rd08(bios, data + 0x0c);
0039             break;
0040         default:
0041             nvkm_debug(&bios->subdev,
0042                    "%08x: PCIR signature (%08x) unknown\n",
0043                    data, nvbios_rd32(bios, data + 0x00));
0044             data = 0;
0045             break;
0046         }
0047     }
0048     return data;
0049 }
0050
0051 u32
0052 nvbios_pcirTp(struct nvkm_bios *bios, u32 base, u8 *ver, u16 *hdr,
0053           struct nvbios_pcirT *info)
0054 {
0055     u32 data = nvbios_pcirTe(bios, base, ver, hdr);
0056     memset(info, 0x00, sizeof(*info));
0057     if (data) {
0058         info->vendor_id = nvbios_rd16(bios, data + 0x04);
0059         info->device_id = nvbios_rd16(bios, data + 0x06);
0060         info->class_code[0] = nvbios_rd08(bios, data + 0x0d);
0061         info->class_code[1] = nvbios_rd08(bios, data + 0x0e);
0062         info->class_code[2] = nvbios_rd08(bios, data + 0x0f);
0063         info->image_size = nvbios_rd16(bios, data + 0x10) * 512;
0064         info->image_rev = nvbios_rd16(bios, data + 0x12);
0065         info->image_type = nvbios_rd08(bios, data + 0x14);
0066         info->last = nvbios_rd08(bios, data + 0x15) & 0x80;
0067     }
0068     return data;
0069 }