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      1 /*	$NetBSD: nouveau_nvkm_subdev_bios_P0260.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2013 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
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_bios_P0260.c,v 1.3 2021/12/18 23:45:38 riastradh Exp $");
     28 
     29 #include <subdev/bios.h>
     30 #include <subdev/bios/bit.h>
     31 #include <subdev/bios/P0260.h>
     32 
     33 u32
     34 nvbios_P0260Te(struct nvkm_bios *bios,
     35 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *xnr, u8 *xsz)
     36 {
     37 	struct bit_entry bit_P;
     38 	u32 data = 0x00000000;
     39 
     40 	if (!bit_entry(bios, 'P', &bit_P)) {
     41 		if (bit_P.version == 2 && bit_P.length > 0x63)
     42 			data = nvbios_rd32(bios, bit_P.offset + 0x60);
     43 		if (data) {
     44 			*ver = nvbios_rd08(bios, data + 0);
     45 			switch (*ver) {
     46 			case 0x10:
     47 				*hdr = nvbios_rd08(bios, data + 1);
     48 				*cnt = nvbios_rd08(bios, data + 2);
     49 				*len = 4;
     50 				*xnr = nvbios_rd08(bios, data + 3);
     51 				*xsz = 4;
     52 				return data;
     53 			default:
     54 				break;
     55 			}
     56 		}
     57 	}
     58 
     59 	return 0x00000000;
     60 }
     61 
     62 u32
     63 nvbios_P0260Ee(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len)
     64 {
     65 	u8  hdr, cnt, xnr, xsz;
     66 	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, len, &xnr, &xsz);
     67 	if (data && idx < cnt)
     68 		return data + hdr + (idx * *len);
     69 	return 0x00000000;
     70 }
     71 
     72 u32
     73 nvbios_P0260Ep(struct nvkm_bios *bios, int idx, u8 *ver, u8 *len,
     74 	       struct nvbios_P0260E *info)
     75 {
     76 	u32 data = nvbios_P0260Ee(bios, idx, ver, len);
     77 	memset(info, 0x00, sizeof(*info));
     78 	switch (!!data * *ver) {
     79 	case 0x10:
     80 		info->data = nvbios_rd32(bios, data);
     81 		return data;
     82 	default:
     83 		break;
     84 	}
     85 	return 0x00000000;
     86 }
     87 
     88 u32
     89 nvbios_P0260Xe(struct nvkm_bios *bios, int idx, u8 *ver, u8 *xsz)
     90 {
     91 	u8  hdr, cnt, len, xnr;
     92 	u32 data = nvbios_P0260Te(bios, ver, &hdr, &cnt, &len, &xnr, xsz);
     93 	if (data && idx < xnr)
     94 		return data + hdr + (cnt * len) + (idx * *xsz);
     95 	return 0x00000000;
     96 }
     97 
     98 u32
     99 nvbios_P0260Xp(struct nvkm_bios *bios, int idx, u8 *ver, u8 *hdr,
    100 	       struct nvbios_P0260X *info)
    101 {
    102 	u32 data = nvbios_P0260Xe(bios, idx, ver, hdr);
    103 	memset(info, 0x00, sizeof(*info));
    104 	switch (!!data * *ver) {
    105 	case 0x10:
    106 		info->data = nvbios_rd32(bios, data);
    107 		return data;
    108 	default:
    109 		break;
    110 	}
    111 	return 0x00000000;
    112 }
    113