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      1 /*	$NetBSD: nouveau_nvkm_subdev_bios_pcir.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2014 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs <bskeggs (at) redhat.com>
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_pcir.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
     28 
     29 #include <subdev/bios.h>
     30 #include <subdev/bios/pcir.h>
     31 
     32 u32
     33 nvbios_pcirTe(struct nvkm_bios *bios, u32 base, u8 *ver, u16 *hdr)
     34 {
     35 	u32 data = nvbios_rd16(bios, base + 0x18);
     36 	if (data) {
     37 		data += base;
     38 		switch (nvbios_rd32(bios, data + 0x00)) {
     39 		case 0x52494350: /* PCIR */
     40 		case 0x53494752: /* RGIS */
     41 		case 0x5344504e: /* NPDS */
     42 			*hdr = nvbios_rd16(bios, data + 0x0a);
     43 			*ver = nvbios_rd08(bios, data + 0x0c);
     44 			break;
     45 		default:
     46 			nvkm_debug(&bios->subdev,
     47 				   "%08x: PCIR signature (%08x) unknown\n",
     48 				   data, nvbios_rd32(bios, data + 0x00));
     49 			data = 0;
     50 			break;
     51 		}
     52 	}
     53 	return data;
     54 }
     55 
     56 u32
     57 nvbios_pcirTp(struct nvkm_bios *bios, u32 base, u8 *ver, u16 *hdr,
     58 	      struct nvbios_pcirT *info)
     59 {
     60 	u32 data = nvbios_pcirTe(bios, base, ver, hdr);
     61 	memset(info, 0x00, sizeof(*info));
     62 	if (data) {
     63 		info->vendor_id = nvbios_rd16(bios, data + 0x04);
     64 		info->device_id = nvbios_rd16(bios, data + 0x06);
     65 		info->class_code[0] = nvbios_rd08(bios, data + 0x0d);
     66 		info->class_code[1] = nvbios_rd08(bios, data + 0x0e);
     67 		info->class_code[2] = nvbios_rd08(bios, data + 0x0f);
     68 		info->image_size = nvbios_rd16(bios, data + 0x10) * 512;
     69 		info->image_rev = nvbios_rd16(bios, data + 0x12);
     70 		info->image_type = nvbios_rd08(bios, data + 0x14);
     71 		info->last = nvbios_rd08(bios, data + 0x15) & 0x80;
     72 	}
     73 	return data;
     74 }
     75