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1 | /* |
2 | * Copyright 2010 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 | ||
760285e7 | 25 | #include <drm/drmP.h> |
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26 | |
27 | #include "nouveau_drv.h" | |
28 | #include "nouveau_pm.h" | |
a0b25635 | 29 | #include "nouveau_gpio.h" |
330c5988 | 30 | |
a31214ef | 31 | static const enum dcb_gpio_tag vidtag[] = { 0x04, 0x05, 0x06, 0x1a, 0x73 }; |
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32 | static int nr_vidtag = sizeof(vidtag) / sizeof(vidtag[0]); |
33 | ||
34 | int | |
35 | nouveau_voltage_gpio_get(struct drm_device *dev) | |
36 | { | |
37 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
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38 | struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage; |
39 | u8 vid = 0; | |
40 | int i; | |
41 | ||
42 | for (i = 0; i < nr_vidtag; i++) { | |
43 | if (!(volt->vid_mask & (1 << i))) | |
44 | continue; | |
45 | ||
a0b25635 | 46 | vid |= nouveau_gpio_func_get(dev, vidtag[i]) << i; |
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47 | } |
48 | ||
49 | return nouveau_volt_lvl_lookup(dev, vid); | |
50 | } | |
51 | ||
52 | int | |
53 | nouveau_voltage_gpio_set(struct drm_device *dev, int voltage) | |
54 | { | |
55 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
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56 | struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage; |
57 | int vid, i; | |
58 | ||
59 | vid = nouveau_volt_vid_lookup(dev, voltage); | |
60 | if (vid < 0) | |
61 | return vid; | |
62 | ||
63 | for (i = 0; i < nr_vidtag; i++) { | |
64 | if (!(volt->vid_mask & (1 << i))) | |
65 | continue; | |
66 | ||
a0b25635 | 67 | nouveau_gpio_func_set(dev, vidtag[i], !!(vid & (1 << i))); |
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68 | } |
69 | ||
70 | return 0; | |
71 | } | |
72 | ||
73 | int | |
74 | nouveau_volt_vid_lookup(struct drm_device *dev, int voltage) | |
75 | { | |
76 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
77 | struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage; | |
78 | int i; | |
79 | ||
80 | for (i = 0; i < volt->nr_level; i++) { | |
81 | if (volt->level[i].voltage == voltage) | |
82 | return volt->level[i].vid; | |
83 | } | |
84 | ||
85 | return -ENOENT; | |
86 | } | |
87 | ||
88 | int | |
89 | nouveau_volt_lvl_lookup(struct drm_device *dev, int vid) | |
90 | { | |
91 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
92 | struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage; | |
93 | int i; | |
94 | ||
95 | for (i = 0; i < volt->nr_level; i++) { | |
96 | if (volt->level[i].vid == vid) | |
97 | return volt->level[i].voltage; | |
98 | } | |
99 | ||
100 | return -ENOENT; | |
101 | } | |
102 | ||
103 | void | |
104 | nouveau_volt_init(struct drm_device *dev) | |
105 | { | |
106 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
107 | struct nouveau_pm_engine *pm = &dev_priv->engine.pm; | |
108 | struct nouveau_pm_voltage *voltage = &pm->voltage; | |
109 | struct nvbios *bios = &dev_priv->vbios; | |
110 | struct bit_entry P; | |
111 | u8 *volt = NULL, *entry; | |
dc7339df | 112 | int i, headerlen, recordlen, entries, vidmask, vidshift; |
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113 | |
114 | if (bios->type == NVBIOS_BIT) { | |
115 | if (bit_table(dev, 'P', &P)) | |
116 | return; | |
117 | ||
118 | if (P.version == 1) | |
f9f9f536 | 119 | volt = ROMPTR(dev, P.data[16]); |
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120 | else |
121 | if (P.version == 2) | |
f9f9f536 | 122 | volt = ROMPTR(dev, P.data[12]); |
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123 | else { |
124 | NV_WARN(dev, "unknown volt for BIT P %d\n", P.version); | |
125 | } | |
126 | } else { | |
127 | if (bios->data[bios->offset + 6] < 0x27) { | |
128 | NV_DEBUG(dev, "BMP version too old for voltage\n"); | |
129 | return; | |
130 | } | |
131 | ||
f9f9f536 | 132 | volt = ROMPTR(dev, bios->data[bios->offset + 0x98]); |
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133 | } |
134 | ||
135 | if (!volt) { | |
136 | NV_DEBUG(dev, "voltage table pointer invalid\n"); | |
137 | return; | |
138 | } | |
139 | ||
140 | switch (volt[0]) { | |
141 | case 0x10: | |
142 | case 0x11: | |
143 | case 0x12: | |
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144 | headerlen = 5; |
145 | recordlen = volt[1]; | |
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146 | entries = volt[2]; |
147 | vidshift = 0; | |
148 | vidmask = volt[4]; | |
149 | break; | |
150 | case 0x20: | |
dc7339df | 151 | headerlen = volt[1]; |
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152 | recordlen = volt[3]; |
153 | entries = volt[2]; | |
154 | vidshift = 0; /* could be vidshift like 0x30? */ | |
155 | vidmask = volt[5]; | |
156 | break; | |
157 | case 0x30: | |
dc7339df | 158 | headerlen = volt[1]; |
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159 | recordlen = volt[2]; |
160 | entries = volt[3]; | |
330c5988 | 161 | vidmask = volt[4]; |
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162 | /* no longer certain what volt[5] is, if it's related to |
163 | * the vid shift then it's definitely not a function of | |
164 | * how many bits are set. | |
165 | * | |
166 | * after looking at a number of nva3+ vbios images, they | |
167 | * all seem likely to have a static shift of 2.. lets | |
168 | * go with that for now until proven otherwise. | |
169 | */ | |
170 | vidshift = 2; | |
330c5988 | 171 | break; |
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172 | case 0x40: |
173 | headerlen = volt[1]; | |
174 | recordlen = volt[2]; | |
175 | entries = volt[3]; /* not a clue what the entries are for.. */ | |
176 | vidmask = volt[11]; /* guess.. */ | |
177 | vidshift = 0; | |
178 | break; | |
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179 | default: |
180 | NV_WARN(dev, "voltage table 0x%02x unknown\n", volt[0]); | |
181 | return; | |
182 | } | |
183 | ||
184 | /* validate vid mask */ | |
185 | voltage->vid_mask = vidmask; | |
186 | if (!voltage->vid_mask) | |
187 | return; | |
188 | ||
189 | i = 0; | |
190 | while (vidmask) { | |
191 | if (i > nr_vidtag) { | |
192 | NV_DEBUG(dev, "vid bit %d unknown\n", i); | |
193 | return; | |
194 | } | |
195 | ||
a0b25635 | 196 | if (!nouveau_gpio_func_valid(dev, vidtag[i])) { |
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197 | NV_DEBUG(dev, "vid bit %d has no gpio tag\n", i); |
198 | return; | |
199 | } | |
200 | ||
201 | vidmask >>= 1; | |
202 | i++; | |
203 | } | |
204 | ||
205 | /* parse vbios entries into common format */ | |
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206 | voltage->version = volt[0]; |
207 | if (voltage->version < 0x40) { | |
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208 | voltage->nr_level = entries; |
209 | voltage->level = | |
210 | kcalloc(entries, sizeof(*voltage->level), GFP_KERNEL); | |
211 | if (!voltage->level) | |
212 | return; | |
330c5988 | 213 | |
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214 | entry = volt + headerlen; |
215 | for (i = 0; i < entries; i++, entry += recordlen) { | |
216 | voltage->level[i].voltage = entry[0] * 10000; | |
217 | voltage->level[i].vid = entry[1] >> vidshift; | |
218 | } | |
219 | } else { | |
220 | u32 volt_uv = ROM32(volt[4]); | |
221 | s16 step_uv = ROM16(volt[8]); | |
222 | u8 vid; | |
223 | ||
224 | voltage->nr_level = voltage->vid_mask + 1; | |
225 | voltage->level = kcalloc(voltage->nr_level, | |
226 | sizeof(*voltage->level), GFP_KERNEL); | |
227 | if (!voltage->level) | |
228 | return; | |
229 | ||
230 | for (vid = 0; vid <= voltage->vid_mask; vid++) { | |
231 | voltage->level[vid].voltage = volt_uv; | |
232 | voltage->level[vid].vid = vid; | |
233 | volt_uv += step_uv; | |
234 | } | |
330c5988 | 235 | } |
f60dfb99 | 236 | |
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237 | voltage->supported = true; |
238 | } | |
239 | ||
240 | void | |
241 | nouveau_volt_fini(struct drm_device *dev) | |
242 | { | |
243 | struct drm_nouveau_private *dev_priv = dev->dev_private; | |
244 | struct nouveau_pm_voltage *volt = &dev_priv->engine.pm.voltage; | |
245 | ||
246 | kfree(volt->level); | |
247 | } |