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d839ede4 AC |
1 | /* |
2 | * Copyright 2011 Intel Corporation | |
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 (including the next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | */ | |
d839ede4 | 24 | #include <linux/acpi.h> |
d839ede4 AC |
25 | #include "psb_drv.h" |
26 | #include "psb_intel_reg.h" | |
27 | ||
28 | #define PCI_ASLE 0xe4 | |
29 | #define PCI_ASLS 0xfc | |
30 | ||
31 | #define OPREGION_HEADER_OFFSET 0 | |
32 | #define OPREGION_ACPI_OFFSET 0x100 | |
33 | #define ACPI_CLID 0x01ac /* current lid state indicator */ | |
34 | #define ACPI_CDCK 0x01b0 /* current docking state indicator */ | |
35 | #define OPREGION_SWSCI_OFFSET 0x200 | |
36 | #define OPREGION_ASLE_OFFSET 0x300 | |
37 | #define OPREGION_VBT_OFFSET 0x400 | |
38 | ||
39 | #define OPREGION_SIGNATURE "IntelGraphicsMem" | |
40 | #define MBOX_ACPI (1<<0) | |
41 | #define MBOX_SWSCI (1<<1) | |
42 | #define MBOX_ASLE (1<<2) | |
43 | ||
44 | struct opregion_header { | |
45 | u8 signature[16]; | |
46 | u32 size; | |
47 | u32 opregion_ver; | |
48 | u8 bios_ver[32]; | |
49 | u8 vbios_ver[16]; | |
50 | u8 driver_ver[16]; | |
51 | u32 mboxes; | |
52 | u8 reserved[164]; | |
53 | } __packed; | |
54 | ||
55 | /* OpRegion mailbox #1: public ACPI methods */ | |
56 | struct opregion_acpi { | |
57 | u32 drdy; /* driver readiness */ | |
58 | u32 csts; /* notification status */ | |
59 | u32 cevt; /* current event */ | |
60 | u8 rsvd1[20]; | |
61 | u32 didl[8]; /* supported display devices ID list */ | |
62 | u32 cpdl[8]; /* currently presented display list */ | |
63 | u32 cadl[8]; /* currently active display list */ | |
64 | u32 nadl[8]; /* next active devices list */ | |
65 | u32 aslp; /* ASL sleep time-out */ | |
66 | u32 tidx; /* toggle table index */ | |
67 | u32 chpd; /* current hotplug enable indicator */ | |
68 | u32 clid; /* current lid state*/ | |
69 | u32 cdck; /* current docking state */ | |
70 | u32 sxsw; /* Sx state resume */ | |
71 | u32 evts; /* ASL supported events */ | |
72 | u32 cnot; /* current OS notification */ | |
73 | u32 nrdy; /* driver status */ | |
74 | u8 rsvd2[60]; | |
75 | } __packed; | |
76 | ||
77 | /* OpRegion mailbox #2: SWSCI */ | |
78 | struct opregion_swsci { | |
79 | /*FIXME: add it later*/ | |
80 | } __packed; | |
81 | ||
82 | /* OpRegion mailbox #3: ASLE */ | |
83 | struct opregion_asle { | |
84 | u32 ardy; /* driver readiness */ | |
85 | u32 aslc; /* ASLE interrupt command */ | |
86 | u32 tche; /* technology enabled indicator */ | |
87 | u32 alsi; /* current ALS illuminance reading */ | |
88 | u32 bclp; /* backlight brightness to set */ | |
89 | u32 pfit; /* panel fitting state */ | |
90 | u32 cblv; /* current brightness level */ | |
91 | u16 bclm[20]; /* backlight level duty cycle mapping table */ | |
92 | u32 cpfm; /* current panel fitting mode */ | |
93 | u32 epfm; /* enabled panel fitting modes */ | |
94 | u8 plut[74]; /* panel LUT and identifier */ | |
95 | u32 pfmb; /* PWM freq and min brightness */ | |
96 | u8 rsvd[102]; | |
97 | } __packed; | |
98 | ||
99 | /* ASLE irq request bits */ | |
100 | #define ASLE_SET_ALS_ILLUM (1 << 0) | |
101 | #define ASLE_SET_BACKLIGHT (1 << 1) | |
102 | #define ASLE_SET_PFIT (1 << 2) | |
103 | #define ASLE_SET_PWM_FREQ (1 << 3) | |
104 | #define ASLE_REQ_MSK 0xf | |
105 | ||
106 | /* response bits of ASLE irq request */ | |
107 | #define ASLE_ALS_ILLUM_FAILED (1<<10) | |
108 | #define ASLE_BACKLIGHT_FAILED (1<<12) | |
109 | #define ASLE_PFIT_FAILED (1<<14) | |
110 | #define ASLE_PWM_FREQ_FAILED (1<<16) | |
111 | ||
112 | /* ASLE backlight brightness to set */ | |
113 | #define ASLE_BCLP_VALID (1<<31) | |
114 | #define ASLE_BCLP_MSK (~(1<<31)) | |
115 | ||
116 | /* ASLE panel fitting request */ | |
117 | #define ASLE_PFIT_VALID (1<<31) | |
118 | #define ASLE_PFIT_CENTER (1<<0) | |
119 | #define ASLE_PFIT_STRETCH_TEXT (1<<1) | |
120 | #define ASLE_PFIT_STRETCH_GFX (1<<2) | |
121 | ||
122 | /* response bits of ASLE irq request */ | |
123 | #define ASLE_ALS_ILLUM_FAILED (1<<10) | |
124 | #define ASLE_BACKLIGHT_FAILED (1<<12) | |
125 | #define ASLE_PFIT_FAILED (1<<14) | |
126 | #define ASLE_PWM_FREQ_FAILED (1<<16) | |
127 | ||
128 | /* ASLE backlight brightness to set */ | |
129 | #define ASLE_BCLP_VALID (1<<31) | |
130 | #define ASLE_BCLP_MSK (~(1<<31)) | |
131 | ||
132 | /* ASLE panel fitting request */ | |
133 | #define ASLE_PFIT_VALID (1<<31) | |
134 | #define ASLE_PFIT_CENTER (1<<0) | |
135 | #define ASLE_PFIT_STRETCH_TEXT (1<<1) | |
136 | #define ASLE_PFIT_STRETCH_GFX (1<<2) | |
137 | ||
138 | /* PWM frequency and minimum brightness */ | |
139 | #define ASLE_PFMB_BRIGHTNESS_MASK (0xff) | |
140 | #define ASLE_PFMB_BRIGHTNESS_VALID (1<<8) | |
141 | #define ASLE_PFMB_PWM_MASK (0x7ffffe00) | |
142 | #define ASLE_PFMB_PWM_VALID (1<<31) | |
143 | ||
144 | #define ASLE_CBLV_VALID (1<<31) | |
145 | ||
166973e5 AC |
146 | static struct psb_intel_opregion *system_opregion; |
147 | ||
d839ede4 AC |
148 | static u32 asle_set_backlight(struct drm_device *dev, u32 bclp) |
149 | { | |
150 | struct drm_psb_private *dev_priv = dev->dev_private; | |
151 | struct opregion_asle *asle = dev_priv->opregion.asle; | |
152 | struct backlight_device *bd = dev_priv->backlight_device; | |
d839ede4 AC |
153 | |
154 | DRM_DEBUG_DRIVER("asle set backlight %x\n", bclp); | |
155 | ||
156 | if (!(bclp & ASLE_BCLP_VALID)) | |
157 | return ASLE_BACKLIGHT_FAILED; | |
158 | ||
159 | if (bd == NULL) | |
160 | return ASLE_BACKLIGHT_FAILED; | |
161 | ||
162 | bclp &= ASLE_BCLP_MSK; | |
163 | if (bclp > 255) | |
164 | return ASLE_BACKLIGHT_FAILED; | |
165 | ||
b7a0c7c5 | 166 | gma_backlight_set(dev, bclp * bd->props.max_brightness / 255); |
fcf92202 | 167 | |
d839ede4 AC |
168 | asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID; |
169 | ||
170 | return 0; | |
171 | } | |
172 | ||
778e26de | 173 | static void psb_intel_opregion_asle_work(struct work_struct *work) |
d839ede4 | 174 | { |
778e26de PJ |
175 | struct psb_intel_opregion *opregion = |
176 | container_of(work, struct psb_intel_opregion, asle_work); | |
177 | struct drm_psb_private *dev_priv = | |
178 | container_of(opregion, struct drm_psb_private, opregion); | |
179 | struct opregion_asle *asle = opregion->asle; | |
d839ede4 AC |
180 | u32 asle_stat = 0; |
181 | u32 asle_req; | |
182 | ||
183 | if (!asle) | |
184 | return; | |
185 | ||
186 | asle_req = asle->aslc & ASLE_REQ_MSK; | |
187 | if (!asle_req) { | |
188 | DRM_DEBUG_DRIVER("non asle set request??\n"); | |
189 | return; | |
190 | } | |
191 | ||
192 | if (asle_req & ASLE_SET_BACKLIGHT) | |
778e26de | 193 | asle_stat |= asle_set_backlight(dev_priv->dev, asle->bclp); |
d839ede4 AC |
194 | |
195 | asle->aslc = asle_stat; | |
778e26de PJ |
196 | |
197 | } | |
198 | ||
199 | void psb_intel_opregion_asle_intr(struct drm_device *dev) | |
200 | { | |
201 | struct drm_psb_private *dev_priv = dev->dev_private; | |
202 | ||
203 | if (dev_priv->opregion.asle) | |
204 | schedule_work(&dev_priv->opregion.asle_work); | |
d839ede4 AC |
205 | } |
206 | ||
207 | #define ASLE_ALS_EN (1<<0) | |
208 | #define ASLE_BLC_EN (1<<1) | |
209 | #define ASLE_PFIT_EN (1<<2) | |
210 | #define ASLE_PFMB_EN (1<<3) | |
211 | ||
212 | void psb_intel_opregion_enable_asle(struct drm_device *dev) | |
213 | { | |
214 | struct drm_psb_private *dev_priv = dev->dev_private; | |
215 | struct opregion_asle *asle = dev_priv->opregion.asle; | |
216 | ||
166973e5 | 217 | if (asle && system_opregion ) { |
d839ede4 AC |
218 | /* Don't do this on Medfield or other non PC like devices, they |
219 | use the bit for something different altogether */ | |
220 | psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE); | |
221 | psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE); | |
222 | ||
223 | asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN | |
224 | | ASLE_PFMB_EN; | |
225 | asle->ardy = 1; | |
226 | } | |
227 | } | |
228 | ||
229 | #define ACPI_EV_DISPLAY_SWITCH (1<<0) | |
230 | #define ACPI_EV_LID (1<<1) | |
231 | #define ACPI_EV_DOCK (1<<2) | |
232 | ||
d839ede4 AC |
233 | |
234 | static int psb_intel_opregion_video_event(struct notifier_block *nb, | |
235 | unsigned long val, void *data) | |
236 | { | |
237 | /* The only video events relevant to opregion are 0x80. These indicate | |
238 | either a docking event, lid switch or display switch request. In | |
239 | Linux, these are handled by the dock, button and video drivers. | |
240 | We might want to fix the video driver to be opregion-aware in | |
241 | future, but right now we just indicate to the firmware that the | |
242 | request has been handled */ | |
243 | ||
244 | struct opregion_acpi *acpi; | |
245 | ||
246 | if (!system_opregion) | |
247 | return NOTIFY_DONE; | |
248 | ||
249 | acpi = system_opregion->acpi; | |
250 | acpi->csts = 0; | |
251 | ||
252 | return NOTIFY_OK; | |
253 | } | |
254 | ||
255 | static struct notifier_block psb_intel_opregion_notifier = { | |
256 | .notifier_call = psb_intel_opregion_video_event, | |
257 | }; | |
258 | ||
259 | void psb_intel_opregion_init(struct drm_device *dev) | |
260 | { | |
261 | struct drm_psb_private *dev_priv = dev->dev_private; | |
262 | struct psb_intel_opregion *opregion = &dev_priv->opregion; | |
263 | ||
264 | if (!opregion->header) | |
265 | return; | |
266 | ||
267 | if (opregion->acpi) { | |
268 | /* Notify BIOS we are ready to handle ACPI video ext notifs. | |
269 | * Right now, all the events are handled by the ACPI video | |
270 | * module. We don't actually need to do anything with them. */ | |
271 | opregion->acpi->csts = 0; | |
272 | opregion->acpi->drdy = 1; | |
273 | ||
274 | system_opregion = opregion; | |
275 | register_acpi_notifier(&psb_intel_opregion_notifier); | |
276 | } | |
d839ede4 AC |
277 | } |
278 | ||
279 | void psb_intel_opregion_fini(struct drm_device *dev) | |
280 | { | |
281 | struct drm_psb_private *dev_priv = dev->dev_private; | |
282 | struct psb_intel_opregion *opregion = &dev_priv->opregion; | |
283 | ||
284 | if (!opregion->header) | |
285 | return; | |
286 | ||
287 | if (opregion->acpi) { | |
288 | opregion->acpi->drdy = 0; | |
289 | ||
290 | system_opregion = NULL; | |
291 | unregister_acpi_notifier(&psb_intel_opregion_notifier); | |
292 | } | |
293 | ||
778e26de PJ |
294 | cancel_work_sync(&opregion->asle_work); |
295 | ||
d839ede4 AC |
296 | /* just clear all opregion memory pointers now */ |
297 | iounmap(opregion->header); | |
298 | opregion->header = NULL; | |
299 | opregion->acpi = NULL; | |
300 | opregion->swsci = NULL; | |
301 | opregion->asle = NULL; | |
302 | opregion->vbt = NULL; | |
303 | } | |
304 | ||
305 | int psb_intel_opregion_setup(struct drm_device *dev) | |
306 | { | |
307 | struct drm_psb_private *dev_priv = dev->dev_private; | |
308 | struct psb_intel_opregion *opregion = &dev_priv->opregion; | |
309 | u32 opregion_phy, mboxes; | |
d64363c7 | 310 | void __iomem *base; |
d839ede4 AC |
311 | int err = 0; |
312 | ||
313 | pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy); | |
314 | if (opregion_phy == 0) { | |
315 | DRM_DEBUG_DRIVER("ACPI Opregion not supported\n"); | |
316 | return -ENOTSUPP; | |
317 | } | |
778e26de PJ |
318 | |
319 | INIT_WORK(&opregion->asle_work, psb_intel_opregion_asle_work); | |
320 | ||
d839ede4 | 321 | DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy); |
d839ede4 | 322 | base = acpi_os_ioremap(opregion_phy, 8*1024); |
d839ede4 AC |
323 | if (!base) |
324 | return -ENOMEM; | |
325 | ||
326 | if (memcmp(base, OPREGION_SIGNATURE, 16)) { | |
327 | DRM_DEBUG_DRIVER("opregion signature mismatch\n"); | |
328 | err = -EINVAL; | |
329 | goto err_out; | |
330 | } | |
331 | ||
332 | opregion->header = base; | |
333 | opregion->vbt = base + OPREGION_VBT_OFFSET; | |
334 | ||
335 | opregion->lid_state = base + ACPI_CLID; | |
336 | ||
337 | mboxes = opregion->header->mboxes; | |
338 | if (mboxes & MBOX_ACPI) { | |
339 | DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); | |
340 | opregion->acpi = base + OPREGION_ACPI_OFFSET; | |
341 | } | |
342 | ||
343 | if (mboxes & MBOX_ASLE) { | |
344 | DRM_DEBUG_DRIVER("ASLE supported\n"); | |
345 | opregion->asle = base + OPREGION_ASLE_OFFSET; | |
346 | } | |
347 | ||
348 | return 0; | |
349 | ||
350 | err_out: | |
351 | iounmap(base); | |
352 | return err; | |
353 | } | |
354 |