1 | /* $NetBSD: nouveau_subdev_bios_dcb.c,v 1.1.1.1 2014/08/06 12:36:28 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_bios_dcb.c,v 1.1.1.1 2014/08/06 12:36:28 riastradh Exp $" ); |
29 | |
30 | #include "core/device.h" |
31 | |
32 | #include "subdev/bios.h" |
33 | #include "subdev/bios/dcb.h" |
34 | |
35 | u16 |
36 | dcb_table(struct nouveau_bios *bios, u8 *ver, u8 *hdr, u8 *cnt, u8 *len) |
37 | { |
38 | struct nouveau_device *device = nv_device(bios); |
39 | u16 dcb = 0x0000; |
40 | |
41 | if (device->card_type > NV_04) |
42 | dcb = nv_ro16(bios, 0x36); |
43 | if (!dcb) { |
44 | nv_warn(bios, "DCB table not found\n" ); |
45 | return dcb; |
46 | } |
47 | |
48 | *ver = nv_ro08(bios, dcb); |
49 | |
50 | if (*ver >= 0x41) { |
51 | nv_warn(bios, "DCB version 0x%02x unknown\n" , *ver); |
52 | return 0x0000; |
53 | } else |
54 | if (*ver >= 0x30) { |
55 | if (nv_ro32(bios, dcb + 6) == 0x4edcbdcb) { |
56 | *hdr = nv_ro08(bios, dcb + 1); |
57 | *cnt = nv_ro08(bios, dcb + 2); |
58 | *len = nv_ro08(bios, dcb + 3); |
59 | return dcb; |
60 | } |
61 | } else |
62 | if (*ver >= 0x20) { |
63 | if (nv_ro32(bios, dcb + 4) == 0x4edcbdcb) { |
64 | u16 i2c = nv_ro16(bios, dcb + 2); |
65 | *hdr = 8; |
66 | *cnt = (i2c - dcb) / 8; |
67 | *len = 8; |
68 | return dcb; |
69 | } |
70 | } else |
71 | if (*ver >= 0x15) { |
72 | if (!nv_memcmp(bios, dcb - 7, "DEV_REC" , 7)) { |
73 | u16 i2c = nv_ro16(bios, dcb + 2); |
74 | *hdr = 4; |
75 | *cnt = (i2c - dcb) / 10; |
76 | *len = 10; |
77 | return dcb; |
78 | } |
79 | } else { |
80 | /* |
81 | * v1.4 (some NV15/16, NV11+) seems the same as v1.5, but |
82 | * always has the same single (crt) entry, even when tv-out |
83 | * present, so the conclusion is this version cannot really |
84 | * be used. |
85 | * |
86 | * v1.2 tables (some NV6/10, and NV15+) normally have the |
87 | * same 5 entries, which are not specific to the card and so |
88 | * no use. |
89 | * |
90 | * v1.2 does have an I2C table that read_dcb_i2c_table can |
91 | * handle, but cards exist (nv11 in #14821) with a bad i2c |
92 | * table pointer, so use the indices parsed in |
93 | * parse_bmp_structure. |
94 | * |
95 | * v1.1 (NV5+, maybe some NV4) is entirely unhelpful |
96 | */ |
97 | nv_warn(bios, "DCB contains no useful data\n" ); |
98 | return 0x0000; |
99 | } |
100 | |
101 | nv_warn(bios, "DCB header validation failed\n" ); |
102 | return 0x0000; |
103 | } |
104 | |
105 | u16 |
106 | dcb_outp(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len) |
107 | { |
108 | u8 hdr, cnt; |
109 | u16 dcb = dcb_table(bios, ver, &hdr, &cnt, len); |
110 | if (dcb && idx < cnt) |
111 | return dcb + hdr + (idx * *len); |
112 | return 0x0000; |
113 | } |
114 | |
115 | static inline u16 |
116 | dcb_outp_hasht(struct dcb_output *outp) |
117 | { |
118 | return (outp->extdev << 8) | (outp->location << 4) | outp->type; |
119 | } |
120 | |
121 | static inline u16 |
122 | dcb_outp_hashm(struct dcb_output *outp) |
123 | { |
124 | return (outp->heads << 8) | (outp->link << 6) | outp->or; |
125 | } |
126 | |
127 | u16 |
128 | dcb_outp_parse(struct nouveau_bios *bios, u8 idx, u8 *ver, u8 *len, |
129 | struct dcb_output *outp) |
130 | { |
131 | u16 dcb = dcb_outp(bios, idx, ver, len); |
132 | if (dcb) { |
133 | if (*ver >= 0x20) { |
134 | u32 conn = nv_ro32(bios, dcb + 0x00); |
135 | outp->or = (conn & 0x0f000000) >> 24; |
136 | outp->location = (conn & 0x00300000) >> 20; |
137 | outp->bus = (conn & 0x000f0000) >> 16; |
138 | outp->connector = (conn & 0x0000f000) >> 12; |
139 | outp->heads = (conn & 0x00000f00) >> 8; |
140 | outp->i2c_index = (conn & 0x000000f0) >> 4; |
141 | outp->type = (conn & 0x0000000f); |
142 | outp->link = 0; |
143 | } else { |
144 | dcb = 0x0000; |
145 | } |
146 | |
147 | if (*ver >= 0x40) { |
148 | u32 conf = nv_ro32(bios, dcb + 0x04); |
149 | switch (outp->type) { |
150 | case DCB_OUTPUT_DP: |
151 | switch (conf & 0x00e00000) { |
152 | case 0x00000000: |
153 | outp->dpconf.link_bw = 0x06; |
154 | break; |
155 | case 0x00200000: |
156 | outp->dpconf.link_bw = 0x0a; |
157 | break; |
158 | case 0x00400000: |
159 | default: |
160 | outp->dpconf.link_bw = 0x14; |
161 | break; |
162 | } |
163 | |
164 | switch (conf & 0x0f000000) { |
165 | case 0x0f000000: |
166 | outp->dpconf.link_nr = 4; |
167 | break; |
168 | case 0x03000000: |
169 | outp->dpconf.link_nr = 2; |
170 | break; |
171 | case 0x01000000: |
172 | default: |
173 | outp->dpconf.link_nr = 1; |
174 | break; |
175 | } |
176 | |
177 | /* fall-through... */ |
178 | case DCB_OUTPUT_TMDS: |
179 | case DCB_OUTPUT_LVDS: |
180 | outp->link = (conf & 0x00000030) >> 4; |
181 | outp->sorconf.link = outp->link; /*XXX*/ |
182 | outp->extdev = 0x00; |
183 | if (outp->location != 0) |
184 | outp->extdev = (conf & 0x0000ff00) >> 8; |
185 | break; |
186 | default: |
187 | break; |
188 | } |
189 | } |
190 | |
191 | outp->hasht = dcb_outp_hasht(outp); |
192 | outp->hashm = dcb_outp_hashm(outp); |
193 | } |
194 | return dcb; |
195 | } |
196 | |
197 | u16 |
198 | dcb_outp_match(struct nouveau_bios *bios, u16 type, u16 mask, |
199 | u8 *ver, u8 *len, struct dcb_output *outp) |
200 | { |
201 | u16 dcb, idx = 0; |
202 | while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) { |
203 | if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) { |
204 | if ((dcb_outp_hashm(outp) & mask) == mask) |
205 | break; |
206 | } |
207 | } |
208 | return dcb; |
209 | } |
210 | |
211 | int |
212 | dcb_outp_foreach(struct nouveau_bios *bios, void *data, |
213 | int (*exec)(struct nouveau_bios *, void *, int, u16)) |
214 | { |
215 | int ret, idx = -1; |
216 | u8 ver, len; |
217 | u16 outp; |
218 | |
219 | while ((outp = dcb_outp(bios, ++idx, &ver, &len))) { |
220 | if (nv_ro32(bios, outp) == 0x00000000) |
221 | break; /* seen on an NV11 with DCB v1.5 */ |
222 | if (nv_ro32(bios, outp) == 0xffffffff) |
223 | break; /* seen on an NV17 with DCB v2.0 */ |
224 | |
225 | if (nv_ro08(bios, outp) == DCB_OUTPUT_UNUSED) |
226 | continue; |
227 | if (nv_ro08(bios, outp) == DCB_OUTPUT_EOL) |
228 | break; |
229 | |
230 | ret = exec(bios, data, idx, outp); |
231 | if (ret) |
232 | return ret; |
233 | } |
234 | |
235 | return 0; |
236 | } |
237 | |