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/M0205.h>
27 
28 u32
nvbios_M0205Te(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,u8 * snr,u8 * ssz)29 nvbios_M0205Te(struct nvkm_bios *bios,
30 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz)
31 {
32 	struct bit_entry bit_M;
33 	u32 data = 0x00000000;
34 
35 	if (!bit_entry(bios, 'M', &bit_M)) {
36 		if (bit_M.version == 2 && bit_M.length > 0x08)
37 			data = nvbios_rd32(bios, bit_M.offset + 0x05);
38 		if (data) {
39 			*ver = nvbios_rd08(bios, data + 0x00);
40 			switch (*ver) {
41 			case 0x10:
42 				*hdr = nvbios_rd08(bios, data + 0x01);
43 				*len = nvbios_rd08(bios, data + 0x02);
44 				*ssz = nvbios_rd08(bios, data + 0x03);
45 				*snr = nvbios_rd08(bios, data + 0x04);
46 				*cnt = nvbios_rd08(bios, data + 0x05);
47 				return data;
48 			default:
49 				break;
50 			}
51 		}
52 	}
53 
54 	return 0x00000000;
55 }
56 
57 u32
nvbios_M0205Tp(struct nvkm_bios * bios,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,u8 * snr,u8 * ssz,struct nvbios_M0205T * info)58 nvbios_M0205Tp(struct nvkm_bios *bios,
59 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, u8 *snr, u8 *ssz,
60 	       struct nvbios_M0205T *info)
61 {
62 	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, snr, ssz);
63 	memset(info, 0x00, sizeof(*info));
64 	switch (!!data * *ver) {
65 	case 0x10:
66 		info->freq = nvbios_rd16(bios, data + 0x06);
67 		break;
68 	default:
69 		break;
70 	}
71 	return data;
72 }
73 
74 u32
nvbios_M0205Ee(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len)75 nvbios_M0205Ee(struct nvkm_bios *bios, int idx,
76 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
77 {
78 	u8  snr, ssz;
79 	u32 data = nvbios_M0205Te(bios, ver, hdr, cnt, len, &snr, &ssz);
80 	if (data && idx < *cnt) {
81 		data = data + *hdr + idx * (*len + (snr * ssz));
82 		*hdr = *len;
83 		*cnt = snr;
84 		*len = ssz;
85 		return data;
86 	}
87 	return 0x00000000;
88 }
89 
90 u32
nvbios_M0205Ep(struct nvkm_bios * bios,int idx,u8 * ver,u8 * hdr,u8 * cnt,u8 * len,struct nvbios_M0205E * info)91 nvbios_M0205Ep(struct nvkm_bios *bios, int idx,
92 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len,
93 	       struct nvbios_M0205E *info)
94 {
95 	u32 data = nvbios_M0205Ee(bios, idx, ver, hdr, cnt, len);
96 	memset(info, 0x00, sizeof(*info));
97 	switch (!!data * *ver) {
98 	case 0x10:
99 		info->type = nvbios_rd08(bios, data + 0x00) & 0x0f;
100 		return data;
101 	default:
102 		break;
103 	}
104 	return 0x00000000;
105 }
106 
107 u32
nvbios_M0205Se(struct nvkm_bios * bios,int ent,int idx,u8 * ver,u8 * hdr)108 nvbios_M0205Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
109 {
110 
111 	u8  cnt, len;
112 	u32 data = nvbios_M0205Ee(bios, ent, ver, hdr, &cnt, &len);
113 	if (data && idx < cnt) {
114 		data = data + *hdr + idx * len;
115 		*hdr = len;
116 		return data;
117 	}
118 	return 0x00000000;
119 }
120 
121 u32
nvbios_M0205Sp(struct nvkm_bios * bios,int ent,int idx,u8 * ver,u8 * hdr,struct nvbios_M0205S * info)122 nvbios_M0205Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
123 	       struct nvbios_M0205S *info)
124 {
125 	u32 data = nvbios_M0205Se(bios, ent, idx, ver, hdr);
126 	memset(info, 0x00, sizeof(*info));
127 	switch (!!data * *ver) {
128 	case 0x10:
129 		info->data = nvbios_rd08(bios, data + 0x00);
130 		return data;
131 	default:
132 		break;
133 	}
134 	return 0x00000000;
135 }
136