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 OPREGION_HEADER_OFFSET 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 opregion_header {
46 u8 signature[16];
47 u32 size;
48 u32 opregion_ver;
49 u8 bios_ver[32];
50 u8 vbios_ver[16];
51 u8 driver_ver[16];
52 u32 mboxes;
53 u8 reserved[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
asle_set_backlight(struct drm_device * dev,u32 bclp)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, bclp * PSB_MAX_BRIGHTNESS / 255);
164
165 asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID;
166
167 return 0;
168 }
169
psb_intel_opregion_asle_work(struct work_struct * work)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_priv->dev, asle->bclp);
191
192 asle->aslc = asle_stat;
193
194 }
195
psb_intel_opregion_asle_intr(struct drm_device * dev)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(&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
psb_intel_opregion_enable_asle(struct drm_device * dev)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, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
218 gma_enable_pipestat(dev_priv, 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
psb_intel_opregion_video_event(struct notifier_block * nb,unsigned long val,void * data)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
psb_intel_opregion_init(struct drm_device * dev)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
psb_intel_opregion_fini(struct drm_device * dev)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(&opregion->asle_work);
292
293 /* just clear all opregion memory pointers now */
294 iounmap(opregion->header);
295 opregion->header = NULL;
296 opregion->acpi = NULL;
297 opregion->swsci = NULL;
298 opregion->asle = NULL;
299 opregion->vbt = NULL;
300 }
301
psb_intel_opregion_setup(struct drm_device * dev)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(pdev, PCI_ASLS, &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(opregion_phy, 8*1024);
321 if (!base)
322 return -ENOMEM;
323
324 if (memcmp(base, OPREGION_SIGNATURE, 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(base);
350 return err;
351 }
352
353