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