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/M0209.h>
27 
28 u32
29 nvbios_M0209Te(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 > 0x0c)
37 			data = nvbios_rd32(bios, bit_M.offset + 0x09);
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 = 1;
46 				*cnt = nvbios_rd08(bios, data + 0x04);
47 				return data;
48 			default:
49 				break;
50 			}
51 		}
52 	}
53 
54 	return 0x00000000;
55 }
56 
57 u32
58 nvbios_M0209Ee(struct nvkm_bios *bios, int idx,
59 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len)
60 {
61 	u8  snr, ssz;
62 	u32 data = nvbios_M0209Te(bios, ver, hdr, cnt, len, &snr, &ssz);
63 	if (data && idx < *cnt) {
64 		data = data + *hdr + idx * (*len + (snr * ssz));
65 		*hdr = *len;
66 		*cnt = snr;
67 		*len = ssz;
68 		return data;
69 	}
70 	return 0x00000000;
71 }
72 
73 u32
74 nvbios_M0209Ep(struct nvkm_bios *bios, int idx,
75 	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_M0209E *info)
76 {
77 	u32 data = nvbios_M0209Ee(bios, idx, ver, hdr, cnt, len);
78 	memset(info, 0x00, sizeof(*info));
79 	switch (!!data * *ver) {
80 	case 0x10:
81 		info->v00_40 = (nvbios_rd08(bios, data + 0x00) & 0x40) >> 6;
82 		info->bits   =  nvbios_rd08(bios, data + 0x00) & 0x3f;
83 		info->modulo =  nvbios_rd08(bios, data + 0x01);
84 		info->v02_40 = (nvbios_rd08(bios, data + 0x02) & 0x40) >> 6;
85 		info->v02_07 =  nvbios_rd08(bios, data + 0x02) & 0x07;
86 		info->v03    =  nvbios_rd08(bios, data + 0x03);
87 		return data;
88 	default:
89 		break;
90 	}
91 	return 0x00000000;
92 }
93 
94 u32
95 nvbios_M0209Se(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr)
96 {
97 
98 	u8  cnt, len;
99 	u32 data = nvbios_M0209Ee(bios, ent, ver, hdr, &cnt, &len);
100 	if (data && idx < cnt) {
101 		data = data + *hdr + idx * len;
102 		*hdr = len;
103 		return data;
104 	}
105 	return 0x00000000;
106 }
107 
108 u32
109 nvbios_M0209Sp(struct nvkm_bios *bios, int ent, int idx, u8 *ver, u8 *hdr,
110 	       struct nvbios_M0209S *info)
111 {
112 	struct nvbios_M0209E M0209E;
113 	u8  cnt, len;
114 	u32 data = nvbios_M0209Ep(bios, ent, ver, hdr, &cnt, &len, &M0209E);
115 	if (data) {
116 		u32 i, data = nvbios_M0209Se(bios, ent, idx, ver, hdr);
117 		memset(info, 0x00, sizeof(*info));
118 		switch (!!data * *ver) {
119 		case 0x10:
120 			for (i = 0; i < ARRAY_SIZE(info->data); i++) {
121 				u32 bits = (i % M0209E.modulo) * M0209E.bits;
122 				u32 mask = (1ULL << M0209E.bits) - 1;
123 				u16  off = bits / 8;
124 				u8   mod = bits % 8;
125 				info->data[i] = nvbios_rd32(bios, data + off);
126 				info->data[i] = info->data[i] >> mod;
127 				info->data[i] = info->data[i] & mask;
128 			}
129 			return data;
130 		default:
131 			break;
132 		}
133 	}
134 	return 0x00000000;
135 }
136