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