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1 | /* |
2 | * Copyright 2012 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 | */ | |
d390b480 BS |
24 | #include <subdev/bios.h> |
25 | #include <subdev/bios/dcb.h> | |
26 | #include <subdev/bios/i2c.h> | |
4196faa8 BS |
27 | |
28 | u16 | |
d390b480 | 29 | dcb_i2c_table(struct nvkm_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
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30 | { |
31 | u16 i2c = 0x0000; | |
32 | u16 dcb = dcb_table(bios, ver, hdr, cnt, len); | |
33 | if (dcb) { | |
34 | if (*ver >= 0x15) | |
35 | i2c = nv_ro16(bios, dcb + 2); | |
36 | if (*ver >= 0x30) | |
37 | i2c = nv_ro16(bios, dcb + 4); | |
38 | } | |
39 | ||
c5a09c81 | 40 | if (i2c && *ver >= 0x42) { |
309a5702 BS |
41 | nv_warn(bios, "ccb %02x not supported\n", *ver); |
42 | return 0x0000; | |
43 | } | |
44 | ||
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45 | if (i2c && *ver >= 0x30) { |
46 | *ver = nv_ro08(bios, i2c + 0); | |
47 | *hdr = nv_ro08(bios, i2c + 1); | |
48 | *cnt = nv_ro08(bios, i2c + 2); | |
49 | *len = nv_ro08(bios, i2c + 3); | |
50 | } else { | |
51 | *ver = *ver; /* use DCB version */ | |
52 | *hdr = 0; | |
53 | *cnt = 16; | |
54 | *len = 4; | |
55 | } | |
56 | ||
57 | return i2c; | |
58 | } | |
59 | ||
60 | u16 | |
d390b480 | 61 | dcb_i2c_entry(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len) |
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62 | { |
63 | u8 hdr, cnt; | |
64 | u16 i2c = dcb_i2c_table(bios, ver, &hdr, &cnt, len); | |
65 | if (i2c && idx < cnt) | |
66 | return i2c + hdr + (idx * *len); | |
67 | return 0x0000; | |
68 | } | |
69 | ||
70 | int | |
d390b480 | 71 | dcb_i2c_parse(struct nvkm_bios *bios, u8 idx, struct dcb_i2c_entry *info) |
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72 | { |
73 | u8 ver, len; | |
74 | u16 ent = dcb_i2c_entry(bios, idx, &ver, &len); | |
75 | if (ent) { | |
c5a09c81 | 76 | if (ver >= 0x41) { |
5a6f690c SH |
77 | u32 ent_value = nv_ro32(bios, ent); |
78 | u8 i2c_port = (ent_value >> 27) & 0x1f; | |
79 | u8 dpaux_port = (ent_value >> 22) & 0x1f; | |
80 | /* value 0x1f means unused according to DCB 4.x spec */ | |
81 | if (i2c_port == 0x1f && dpaux_port == 0x1f) | |
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82 | info->type = DCB_I2C_UNUSED; |
83 | else | |
84 | info->type = DCB_I2C_PMGR; | |
85 | } else | |
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86 | if (ver >= 0x30) { |
87 | info->type = nv_ro08(bios, ent + 0x03); | |
88 | } else { | |
89 | info->type = nv_ro08(bios, ent + 0x03) & 0x07; | |
4196faa8 | 90 | if (info->type == 0x07) |
7dcd060c | 91 | info->type = DCB_I2C_UNUSED; |
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92 | } |
93 | ||
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94 | info->drive = DCB_I2C_UNUSED; |
95 | info->sense = DCB_I2C_UNUSED; | |
96 | info->share = DCB_I2C_UNUSED; | |
97 | info->auxch = DCB_I2C_UNUSED; | |
98 | ||
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99 | switch (info->type) { |
100 | case DCB_I2C_NV04_BIT: | |
101 | info->drive = nv_ro08(bios, ent + 0); | |
102 | info->sense = nv_ro08(bios, ent + 1); | |
103 | return 0; | |
104 | case DCB_I2C_NV4E_BIT: | |
105 | info->drive = nv_ro08(bios, ent + 1); | |
106 | return 0; | |
107 | case DCB_I2C_NVIO_BIT: | |
7dcd060c | 108 | info->drive = nv_ro08(bios, ent + 0) & 0x0f; |
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109 | if (nv_ro08(bios, ent + 1) & 0x01) |
110 | info->share = nv_ro08(bios, ent + 1) >> 1; | |
111 | return 0; | |
112 | case DCB_I2C_NVIO_AUX: | |
113 | info->auxch = nv_ro08(bios, ent + 0) & 0x0f; | |
114 | if (nv_ro08(bios, ent + 1) & 0x01) | |
c5a09c81 BS |
115 | info->share = info->auxch; |
116 | return 0; | |
117 | case DCB_I2C_PMGR: | |
118 | info->drive = (nv_ro16(bios, ent + 0) & 0x01f) >> 0; | |
119 | if (info->drive == 0x1f) | |
120 | info->drive = DCB_I2C_UNUSED; | |
121 | info->auxch = (nv_ro16(bios, ent + 0) & 0x3e0) >> 5; | |
122 | if (info->auxch == 0x1f) | |
123 | info->auxch = DCB_I2C_UNUSED; | |
124 | info->share = info->auxch; | |
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125 | return 0; |
126 | case DCB_I2C_UNUSED: | |
127 | return 0; | |
128 | default: | |
129 | nv_warn(bios, "unknown i2c type %d\n", info->type); | |
130 | info->type = DCB_I2C_UNUSED; | |
131 | return 0; | |
132 | } | |
133 | } | |
134 | ||
135 | if (bios->bmp_offset && idx < 2) { | |
136 | /* BMP (from v4.0 has i2c info in the structure, it's in a | |
137 | * fixed location on earlier VBIOS | |
138 | */ | |
139 | if (nv_ro08(bios, bios->bmp_offset + 5) < 4) | |
140 | ent = 0x0048; | |
141 | else | |
142 | ent = 0x0036 + bios->bmp_offset; | |
143 | ||
144 | if (idx == 0) { | |
145 | info->drive = nv_ro08(bios, ent + 4); | |
146 | if (!info->drive) info->drive = 0x3f; | |
147 | info->sense = nv_ro08(bios, ent + 5); | |
148 | if (!info->sense) info->sense = 0x3e; | |
149 | } else | |
150 | if (idx == 1) { | |
151 | info->drive = nv_ro08(bios, ent + 6); | |
152 | if (!info->drive) info->drive = 0x37; | |
153 | info->sense = nv_ro08(bios, ent + 7); | |
154 | if (!info->sense) info->sense = 0x36; | |
155 | } | |
156 | ||
7dcd060c BS |
157 | info->type = DCB_I2C_NV04_BIT; |
158 | info->share = DCB_I2C_UNUSED; | |
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159 | return 0; |
160 | } | |
161 | ||
162 | return -ENOENT; | |
163 | } |