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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 | ||
fcf92202 DC |
166 | if (config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)) { |
167 | int max = bd->props.max_brightness; | |
d112a816 | 168 | gma_backlight_set(dev, bclp * max / 255); |
fcf92202 DC |
169 | } |
170 | ||
d839ede4 AC |
171 | asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID; |
172 | ||
173 | return 0; | |
174 | } | |
175 | ||
778e26de | 176 | static void psb_intel_opregion_asle_work(struct work_struct *work) |
d839ede4 | 177 | { |
778e26de PJ |
178 | struct psb_intel_opregion *opregion = |
179 | container_of(work, struct psb_intel_opregion, asle_work); | |
180 | struct drm_psb_private *dev_priv = | |
181 | container_of(opregion, struct drm_psb_private, opregion); | |
182 | struct opregion_asle *asle = opregion->asle; | |
d839ede4 AC |
183 | u32 asle_stat = 0; |
184 | u32 asle_req; | |
185 | ||
186 | if (!asle) | |
187 | return; | |
188 | ||
189 | asle_req = asle->aslc & ASLE_REQ_MSK; | |
190 | if (!asle_req) { | |
191 | DRM_DEBUG_DRIVER("non asle set request??\n"); | |
192 | return; | |
193 | } | |
194 | ||
195 | if (asle_req & ASLE_SET_BACKLIGHT) | |
778e26de | 196 | asle_stat |= asle_set_backlight(dev_priv->dev, asle->bclp); |
d839ede4 AC |
197 | |
198 | asle->aslc = asle_stat; | |
778e26de PJ |
199 | |
200 | } | |
201 | ||
202 | void psb_intel_opregion_asle_intr(struct drm_device *dev) | |
203 | { | |
204 | struct drm_psb_private *dev_priv = dev->dev_private; | |
205 | ||
206 | if (dev_priv->opregion.asle) | |
207 | schedule_work(&dev_priv->opregion.asle_work); | |
d839ede4 AC |
208 | } |
209 | ||
210 | #define ASLE_ALS_EN (1<<0) | |
211 | #define ASLE_BLC_EN (1<<1) | |
212 | #define ASLE_PFIT_EN (1<<2) | |
213 | #define ASLE_PFMB_EN (1<<3) | |
214 | ||
215 | void psb_intel_opregion_enable_asle(struct drm_device *dev) | |
216 | { | |
217 | struct drm_psb_private *dev_priv = dev->dev_private; | |
218 | struct opregion_asle *asle = dev_priv->opregion.asle; | |
219 | ||
166973e5 | 220 | if (asle && system_opregion ) { |
d839ede4 AC |
221 | /* Don't do this on Medfield or other non PC like devices, they |
222 | use the bit for something different altogether */ | |
223 | psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE); | |
224 | psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE); | |
225 | ||
226 | asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN | |
227 | | ASLE_PFMB_EN; | |
228 | asle->ardy = 1; | |
229 | } | |
230 | } | |
231 | ||
232 | #define ACPI_EV_DISPLAY_SWITCH (1<<0) | |
233 | #define ACPI_EV_LID (1<<1) | |
234 | #define ACPI_EV_DOCK (1<<2) | |
235 | ||
d839ede4 AC |
236 | |
237 | static int psb_intel_opregion_video_event(struct notifier_block *nb, | |
238 | unsigned long val, void *data) | |
239 | { | |
240 | /* The only video events relevant to opregion are 0x80. These indicate | |
241 | either a docking event, lid switch or display switch request. In | |
242 | Linux, these are handled by the dock, button and video drivers. | |
243 | We might want to fix the video driver to be opregion-aware in | |
244 | future, but right now we just indicate to the firmware that the | |
245 | request has been handled */ | |
246 | ||
247 | struct opregion_acpi *acpi; | |
248 | ||
249 | if (!system_opregion) | |
250 | return NOTIFY_DONE; | |
251 | ||
252 | acpi = system_opregion->acpi; | |
253 | acpi->csts = 0; | |
254 | ||
255 | return NOTIFY_OK; | |
256 | } | |
257 | ||
258 | static struct notifier_block psb_intel_opregion_notifier = { | |
259 | .notifier_call = psb_intel_opregion_video_event, | |
260 | }; | |
261 | ||
262 | void psb_intel_opregion_init(struct drm_device *dev) | |
263 | { | |
264 | struct drm_psb_private *dev_priv = dev->dev_private; | |
265 | struct psb_intel_opregion *opregion = &dev_priv->opregion; | |
266 | ||
267 | if (!opregion->header) | |
268 | return; | |
269 | ||
270 | if (opregion->acpi) { | |
271 | /* Notify BIOS we are ready to handle ACPI video ext notifs. | |
272 | * Right now, all the events are handled by the ACPI video | |
273 | * module. We don't actually need to do anything with them. */ | |
274 | opregion->acpi->csts = 0; | |
275 | opregion->acpi->drdy = 1; | |
276 | ||
277 | system_opregion = opregion; | |
278 | register_acpi_notifier(&psb_intel_opregion_notifier); | |
279 | } | |
d839ede4 AC |
280 | } |
281 | ||
282 | void psb_intel_opregion_fini(struct drm_device *dev) | |
283 | { | |
284 | struct drm_psb_private *dev_priv = dev->dev_private; | |
285 | struct psb_intel_opregion *opregion = &dev_priv->opregion; | |
286 | ||
287 | if (!opregion->header) | |
288 | return; | |
289 | ||
290 | if (opregion->acpi) { | |
291 | opregion->acpi->drdy = 0; | |
292 | ||
293 | system_opregion = NULL; | |
294 | unregister_acpi_notifier(&psb_intel_opregion_notifier); | |
295 | } | |
296 | ||
778e26de PJ |
297 | cancel_work_sync(&opregion->asle_work); |
298 | ||
d839ede4 AC |
299 | /* just clear all opregion memory pointers now */ |
300 | iounmap(opregion->header); | |
301 | opregion->header = NULL; | |
302 | opregion->acpi = NULL; | |
303 | opregion->swsci = NULL; | |
304 | opregion->asle = NULL; | |
305 | opregion->vbt = NULL; | |
306 | } | |
307 | ||
308 | int psb_intel_opregion_setup(struct drm_device *dev) | |
309 | { | |
310 | struct drm_psb_private *dev_priv = dev->dev_private; | |
311 | struct psb_intel_opregion *opregion = &dev_priv->opregion; | |
312 | u32 opregion_phy, mboxes; | |
d64363c7 | 313 | void __iomem *base; |
d839ede4 AC |
314 | int err = 0; |
315 | ||
316 | pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy); | |
317 | if (opregion_phy == 0) { | |
318 | DRM_DEBUG_DRIVER("ACPI Opregion not supported\n"); | |
319 | return -ENOTSUPP; | |
320 | } | |
778e26de PJ |
321 | |
322 | INIT_WORK(&opregion->asle_work, psb_intel_opregion_asle_work); | |
323 | ||
d839ede4 | 324 | DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy); |
d839ede4 | 325 | base = acpi_os_ioremap(opregion_phy, 8*1024); |
d839ede4 AC |
326 | if (!base) |
327 | return -ENOMEM; | |
328 | ||
329 | if (memcmp(base, OPREGION_SIGNATURE, 16)) { | |
330 | DRM_DEBUG_DRIVER("opregion signature mismatch\n"); | |
331 | err = -EINVAL; | |
332 | goto err_out; | |
333 | } | |
334 | ||
335 | opregion->header = base; | |
336 | opregion->vbt = base + OPREGION_VBT_OFFSET; | |
337 | ||
338 | opregion->lid_state = base + ACPI_CLID; | |
339 | ||
340 | mboxes = opregion->header->mboxes; | |
341 | if (mboxes & MBOX_ACPI) { | |
342 | DRM_DEBUG_DRIVER("Public ACPI methods supported\n"); | |
343 | opregion->acpi = base + OPREGION_ACPI_OFFSET; | |
344 | } | |
345 | ||
346 | if (mboxes & MBOX_ASLE) { | |
347 | DRM_DEBUG_DRIVER("ASLE supported\n"); | |
348 | opregion->asle = base + OPREGION_ASLE_OFFSET; | |
349 | } | |
350 | ||
351 | return 0; | |
352 | ||
353 | err_out: | |
354 | iounmap(base); | |
355 | return err; | |
356 | } | |
357 |