1 | /* $NetBSD: nouveau_subdev_mxm_mxms.c,v 1.2 2016/04/22 19:40:55 riastradh Exp $ */ |
2 | |
3 | /* |
4 | * Copyright 2012 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 | |
27 | #include <sys/cdefs.h> |
28 | __KERNEL_RCSID(0, "$NetBSD: nouveau_subdev_mxm_mxms.c,v 1.2 2016/04/22 19:40:55 riastradh Exp $" ); |
29 | |
30 | #include <subdev/mxm.h> |
31 | #include "mxms.h" |
32 | |
33 | #define ROM16(x) le16_to_cpu(*(u16 *)&(x)) |
34 | #define ROM32(x) le32_to_cpu(*(u32 *)&(x)) |
35 | |
36 | static u8 * |
37 | mxms_data(struct nouveau_mxm *mxm) |
38 | { |
39 | return mxm->mxms; |
40 | |
41 | } |
42 | |
43 | u16 |
44 | mxms_version(struct nouveau_mxm *mxm) |
45 | { |
46 | u8 *mxms = mxms_data(mxm); |
47 | u16 version = (mxms[4] << 8) | mxms[5]; |
48 | switch (version ) { |
49 | case 0x0200: |
50 | case 0x0201: |
51 | case 0x0300: |
52 | return version; |
53 | default: |
54 | break; |
55 | } |
56 | |
57 | nv_debug(mxm, "unknown version %d.%d\n" , mxms[4], mxms[5]); |
58 | return 0x0000; |
59 | } |
60 | |
61 | u16 |
62 | (struct nouveau_mxm *mxm) |
63 | { |
64 | return 8; |
65 | } |
66 | |
67 | u16 |
68 | mxms_structlen(struct nouveau_mxm *mxm) |
69 | { |
70 | return *(u16 *)&mxms_data(mxm)[6]; |
71 | } |
72 | |
73 | bool |
74 | mxms_checksum(struct nouveau_mxm *mxm) |
75 | { |
76 | u16 size = mxms_headerlen(mxm) + mxms_structlen(mxm); |
77 | u8 *mxms = mxms_data(mxm), sum = 0; |
78 | while (size--) |
79 | sum += *mxms++; |
80 | if (sum) { |
81 | nv_debug(mxm, "checksum invalid\n" ); |
82 | return false; |
83 | } |
84 | return true; |
85 | } |
86 | |
87 | bool |
88 | mxms_valid(struct nouveau_mxm *mxm) |
89 | { |
90 | u8 *mxms = mxms_data(mxm); |
91 | if (*(u32 *)mxms != 0x5f4d584d) { |
92 | nv_debug(mxm, "signature invalid\n" ); |
93 | return false; |
94 | } |
95 | |
96 | if (!mxms_version(mxm) || !mxms_checksum(mxm)) |
97 | return false; |
98 | |
99 | return true; |
100 | } |
101 | |
102 | bool |
103 | mxms_foreach(struct nouveau_mxm *mxm, u8 types, |
104 | bool (*exec)(struct nouveau_mxm *, u8 *, void *), void *info) |
105 | { |
106 | u8 *mxms = mxms_data(mxm); |
107 | u8 *desc = mxms + mxms_headerlen(mxm); |
108 | u8 *fini = desc + mxms_structlen(mxm) - 1; |
109 | while (desc < fini) { |
110 | u8 type = desc[0] & 0x0f; |
111 | u8 = 0; |
112 | u8 recordlen = 0; |
113 | u8 entries = 0; |
114 | |
115 | switch (type) { |
116 | case 0: /* Output Device Structure */ |
117 | if (mxms_version(mxm) >= 0x0300) |
118 | headerlen = 8; |
119 | else |
120 | headerlen = 6; |
121 | break; |
122 | case 1: /* System Cooling Capability Structure */ |
123 | case 2: /* Thermal Structure */ |
124 | case 3: /* Input Power Structure */ |
125 | headerlen = 4; |
126 | break; |
127 | case 4: /* GPIO Device Structure */ |
128 | headerlen = 4; |
129 | recordlen = 2; |
130 | entries = (ROM32(desc[0]) & 0x01f00000) >> 20; |
131 | break; |
132 | case 5: /* Vendor Specific Structure */ |
133 | headerlen = 8; |
134 | break; |
135 | case 6: /* Backlight Control Structure */ |
136 | if (mxms_version(mxm) >= 0x0300) { |
137 | headerlen = 4; |
138 | recordlen = 8; |
139 | entries = (desc[1] & 0xf0) >> 4; |
140 | } else { |
141 | headerlen = 8; |
142 | } |
143 | break; |
144 | case 7: /* Fan Control Structure */ |
145 | headerlen = 8; |
146 | recordlen = 4; |
147 | entries = desc[1] & 0x07; |
148 | break; |
149 | default: |
150 | nv_debug(mxm, "unknown descriptor type %d\n" , type); |
151 | return false; |
152 | } |
153 | |
154 | if (nv_subdev(mxm)->debug >= NV_DBG_DEBUG && (exec == NULL)) { |
155 | static const char * mxms_desc_name[] = { |
156 | "ODS" , "SCCS" , "TS" , "IPS" , |
157 | "GSD" , "VSS" , "BCS" , "FCS" , |
158 | }; |
159 | u8 *dump = desc; |
160 | int i, j; |
161 | |
162 | nv_debug(mxm, "%4s: " , mxms_desc_name[type]); |
163 | for (j = headerlen - 1; j >= 0; j--) |
164 | pr_cont("%02x" , dump[j]); |
165 | pr_cont("\n" ); |
166 | dump += headerlen; |
167 | |
168 | for (i = 0; i < entries; i++, dump += recordlen) { |
169 | nv_debug(mxm, " " ); |
170 | for (j = recordlen - 1; j >= 0; j--) |
171 | pr_cont("%02x" , dump[j]); |
172 | pr_cont("\n" ); |
173 | } |
174 | } |
175 | |
176 | if ((types & (1 << type)) && (exec != NULL)) { |
177 | if (!exec(mxm, desc, info)) |
178 | return false; |
179 | } |
180 | |
181 | desc += headerlen + (entries * recordlen); |
182 | } |
183 | |
184 | return true; |
185 | } |
186 | |
187 | void |
188 | mxms_output_device(struct nouveau_mxm *mxm, u8 *pdata, struct mxms_odev *desc) |
189 | { |
190 | u64 data = ROM32(pdata[0]); |
191 | if (mxms_version(mxm) >= 0x0300) |
192 | data |= (u64)ROM16(pdata[4]) << 32; |
193 | |
194 | desc->outp_type = (data & 0x00000000000000f0ULL) >> 4; |
195 | desc->ddc_port = (data & 0x0000000000000f00ULL) >> 8; |
196 | desc->conn_type = (data & 0x000000000001f000ULL) >> 12; |
197 | desc->dig_conn = (data & 0x0000000000780000ULL) >> 19; |
198 | } |
199 | |