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1/*
2 * Copyright 2008 Intel Corporation <hong.liu@intel.com>
3 * Copyright 2008 Red Hat <mjg@redhat.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sub license, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NON-INFRINGEMENT. IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS BE
21 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 *
26 */
27
28#include <linux/acpi.h>
29#include <linux/acpi_io.h>
30#include <acpi/video.h>
31
32#include "drmP.h"
33#include "i915_drm.h"
34#include "i915_drv.h"
35#include "intel_drv.h"
36
37#define PCI_ASLE 0xe4
38#define PCI_ASLS 0xfc
39
40#define OPREGION_HEADER_OFFSET 0
41#define OPREGION_ACPI_OFFSET 0x100
42#define ACPI_CLID 0x01ac /* current lid state indicator */
43#define ACPI_CDCK 0x01b0 /* current docking state indicator */
44#define OPREGION_SWSCI_OFFSET 0x200
45#define OPREGION_ASLE_OFFSET 0x300
46#define OPREGION_VBT_OFFSET 0x400
47
48#define OPREGION_SIGNATURE "IntelGraphicsMem"
49#define MBOX_ACPI (1<<0)
50#define MBOX_SWSCI (1<<1)
51#define MBOX_ASLE (1<<2)
52
53struct opregion_header {
54 u8 signature[16];
55 u32 size;
56 u32 opregion_ver;
57 u8 bios_ver[32];
58 u8 vbios_ver[16];
59 u8 driver_ver[16];
60 u32 mboxes;
61 u8 reserved[164];
62} __attribute__((packed));
63
64/* OpRegion mailbox #1: public ACPI methods */
65struct opregion_acpi {
66 u32 drdy; /* driver readiness */
67 u32 csts; /* notification status */
68 u32 cevt; /* current event */
69 u8 rsvd1[20];
70 u32 didl[8]; /* supported display devices ID list */
71 u32 cpdl[8]; /* currently presented display list */
72 u32 cadl[8]; /* currently active display list */
73 u32 nadl[8]; /* next active devices list */
74 u32 aslp; /* ASL sleep time-out */
75 u32 tidx; /* toggle table index */
76 u32 chpd; /* current hotplug enable indicator */
77 u32 clid; /* current lid state*/
78 u32 cdck; /* current docking state */
79 u32 sxsw; /* Sx state resume */
80 u32 evts; /* ASL supported events */
81 u32 cnot; /* current OS notification */
82 u32 nrdy; /* driver status */
83 u8 rsvd2[60];
84} __attribute__((packed));
85
86/* OpRegion mailbox #2: SWSCI */
87struct opregion_swsci {
88 u32 scic; /* SWSCI command|status|data */
89 u32 parm; /* command parameters */
90 u32 dslp; /* driver sleep time-out */
91 u8 rsvd[244];
92} __attribute__((packed));
93
94/* OpRegion mailbox #3: ASLE */
95struct opregion_asle {
96 u32 ardy; /* driver readiness */
97 u32 aslc; /* ASLE interrupt command */
98 u32 tche; /* technology enabled indicator */
99 u32 alsi; /* current ALS illuminance reading */
100 u32 bclp; /* backlight brightness to set */
101 u32 pfit; /* panel fitting state */
102 u32 cblv; /* current brightness level */
103 u16 bclm[20]; /* backlight level duty cycle mapping table */
104 u32 cpfm; /* current panel fitting mode */
105 u32 epfm; /* enabled panel fitting modes */
106 u8 plut[74]; /* panel LUT and identifier */
107 u32 pfmb; /* PWM freq and min brightness */
108 u8 rsvd[102];
109} __attribute__((packed));
110
111/* ASLE irq request bits */
112#define ASLE_SET_ALS_ILLUM (1 << 0)
113#define ASLE_SET_BACKLIGHT (1 << 1)
114#define ASLE_SET_PFIT (1 << 2)
115#define ASLE_SET_PWM_FREQ (1 << 3)
116#define ASLE_REQ_MSK 0xf
117
118/* response bits of ASLE irq request */
119#define ASLE_ALS_ILLUM_FAILED (1<<10)
120#define ASLE_BACKLIGHT_FAILED (1<<12)
121#define ASLE_PFIT_FAILED (1<<14)
122#define ASLE_PWM_FREQ_FAILED (1<<16)
123
124/* ASLE backlight brightness to set */
125#define ASLE_BCLP_VALID (1<<31)
126#define ASLE_BCLP_MSK (~(1<<31))
127
128/* ASLE panel fitting request */
129#define ASLE_PFIT_VALID (1<<31)
130#define ASLE_PFIT_CENTER (1<<0)
131#define ASLE_PFIT_STRETCH_TEXT (1<<1)
132#define ASLE_PFIT_STRETCH_GFX (1<<2)
133
134/* PWM frequency and minimum brightness */
135#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
136#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
137#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
138#define ASLE_PFMB_PWM_VALID (1<<31)
139
140#define ASLE_CBLV_VALID (1<<31)
141
142#define ACPI_OTHER_OUTPUT (0<<8)
143#define ACPI_VGA_OUTPUT (1<<8)
144#define ACPI_TV_OUTPUT (2<<8)
145#define ACPI_DIGITAL_OUTPUT (3<<8)
146#define ACPI_LVDS_OUTPUT (4<<8)
147
148#ifdef CONFIG_ACPI
149static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
150{
151 struct drm_i915_private *dev_priv = dev->dev_private;
152 struct opregion_asle *asle = dev_priv->opregion.asle;
153 u32 max;
154
155 if (!(bclp & ASLE_BCLP_VALID))
156 return ASLE_BACKLIGHT_FAILED;
157
158 bclp &= ASLE_BCLP_MSK;
159 if (bclp > 255)
160 return ASLE_BACKLIGHT_FAILED;
161
162 max = intel_panel_get_max_backlight(dev);
163 intel_panel_set_backlight(dev, bclp * max / 255);
164 asle->cblv = (bclp*0x64)/0xff | ASLE_CBLV_VALID;
165
166 return 0;
167}
168
169static u32 asle_set_als_illum(struct drm_device *dev, u32 alsi)
170{
171 /* alsi is the current ALS reading in lux. 0 indicates below sensor
172 range, 0xffff indicates above sensor range. 1-0xfffe are valid */
173 return 0;
174}
175
176static u32 asle_set_pwm_freq(struct drm_device *dev, u32 pfmb)
177{
178 struct drm_i915_private *dev_priv = dev->dev_private;
179 if (pfmb & ASLE_PFMB_PWM_VALID) {
180 u32 blc_pwm_ctl = I915_READ(BLC_PWM_CTL);
181 u32 pwm = pfmb & ASLE_PFMB_PWM_MASK;
182 blc_pwm_ctl &= BACKLIGHT_DUTY_CYCLE_MASK;
183 pwm = pwm >> 9;
184 /* FIXME - what do we do with the PWM? */
185 }
186 return 0;
187}
188
189static u32 asle_set_pfit(struct drm_device *dev, u32 pfit)
190{
191 /* Panel fitting is currently controlled by the X code, so this is a
192 noop until modesetting support works fully */
193 if (!(pfit & ASLE_PFIT_VALID))
194 return ASLE_PFIT_FAILED;
195 return 0;
196}
197
198void intel_opregion_asle_intr(struct drm_device *dev)
199{
200 struct drm_i915_private *dev_priv = dev->dev_private;
201 struct opregion_asle *asle = dev_priv->opregion.asle;
202 u32 asle_stat = 0;
203 u32 asle_req;
204
205 if (!asle)
206 return;
207
208 asle_req = asle->aslc & ASLE_REQ_MSK;
209
210 if (!asle_req) {
211 DRM_DEBUG_DRIVER("non asle set request??\n");
212 return;
213 }
214
215 if (asle_req & ASLE_SET_ALS_ILLUM)
216 asle_stat |= asle_set_als_illum(dev, asle->alsi);
217
218 if (asle_req & ASLE_SET_BACKLIGHT)
219 asle_stat |= asle_set_backlight(dev, asle->bclp);
220
221 if (asle_req & ASLE_SET_PFIT)
222 asle_stat |= asle_set_pfit(dev, asle->pfit);
223
224 if (asle_req & ASLE_SET_PWM_FREQ)
225 asle_stat |= asle_set_pwm_freq(dev, asle->pfmb);
226
227 asle->aslc = asle_stat;
228}
229
230void intel_opregion_gse_intr(struct drm_device *dev)
231{
232 struct drm_i915_private *dev_priv = dev->dev_private;
233 struct opregion_asle *asle = dev_priv->opregion.asle;
234 u32 asle_stat = 0;
235 u32 asle_req;
236
237 if (!asle)
238 return;
239
240 asle_req = asle->aslc & ASLE_REQ_MSK;
241
242 if (!asle_req) {
243 DRM_DEBUG_DRIVER("non asle set request??\n");
244 return;
245 }
246
247 if (asle_req & ASLE_SET_ALS_ILLUM) {
248 DRM_DEBUG_DRIVER("Illum is not supported\n");
249 asle_stat |= ASLE_ALS_ILLUM_FAILED;
250 }
251
252 if (asle_req & ASLE_SET_BACKLIGHT)
253 asle_stat |= asle_set_backlight(dev, asle->bclp);
254
255 if (asle_req & ASLE_SET_PFIT) {
256 DRM_DEBUG_DRIVER("Pfit is not supported\n");
257 asle_stat |= ASLE_PFIT_FAILED;
258 }
259
260 if (asle_req & ASLE_SET_PWM_FREQ) {
261 DRM_DEBUG_DRIVER("PWM freq is not supported\n");
262 asle_stat |= ASLE_PWM_FREQ_FAILED;
263 }
264
265 asle->aslc = asle_stat;
266}
267#define ASLE_ALS_EN (1<<0)
268#define ASLE_BLC_EN (1<<1)
269#define ASLE_PFIT_EN (1<<2)
270#define ASLE_PFMB_EN (1<<3)
271
272void intel_opregion_enable_asle(struct drm_device *dev)
273{
274 struct drm_i915_private *dev_priv = dev->dev_private;
275 struct opregion_asle *asle = dev_priv->opregion.asle;
276
277 if (asle) {
278 if (IS_MOBILE(dev))
279 intel_enable_asle(dev);
280
281 asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN |
282 ASLE_PFMB_EN;
283 asle->ardy = 1;
284 }
285}
286
287#define ACPI_EV_DISPLAY_SWITCH (1<<0)
288#define ACPI_EV_LID (1<<1)
289#define ACPI_EV_DOCK (1<<2)
290
291static struct intel_opregion *system_opregion;
292
293static int intel_opregion_video_event(struct notifier_block *nb,
294 unsigned long val, void *data)
295{
296 /* The only video events relevant to opregion are 0x80. These indicate
297 either a docking event, lid switch or display switch request. In
298 Linux, these are handled by the dock, button and video drivers.
299 */
300
301 struct opregion_acpi *acpi;
302 struct acpi_bus_event *event = data;
303 int ret = NOTIFY_OK;
304
305 if (strcmp(event->device_class, ACPI_VIDEO_CLASS) != 0)
306 return NOTIFY_DONE;
307
308 if (!system_opregion)
309 return NOTIFY_DONE;
310
311 acpi = system_opregion->acpi;
312
313 if (event->type == 0x80 && !(acpi->cevt & 0x1))
314 ret = NOTIFY_BAD;
315
316 acpi->csts = 0;
317
318 return ret;
319}
320
321static struct notifier_block intel_opregion_notifier = {
322 .notifier_call = intel_opregion_video_event,
323};
324
325/*
326 * Initialise the DIDL field in opregion. This passes a list of devices to
327 * the firmware. Values are defined by section B.4.2 of the ACPI specification
328 * (version 3)
329 */
330
331static void intel_didl_outputs(struct drm_device *dev)
332{
333 struct drm_i915_private *dev_priv = dev->dev_private;
334 struct intel_opregion *opregion = &dev_priv->opregion;
335 struct drm_connector *connector;
336 acpi_handle handle;
337 struct acpi_device *acpi_dev, *acpi_cdev, *acpi_video_bus = NULL;
338 unsigned long long device_id;
339 acpi_status status;
340 int i = 0;
341
342 handle = DEVICE_ACPI_HANDLE(&dev->pdev->dev);
343 if (!handle || ACPI_FAILURE(acpi_bus_get_device(handle, &acpi_dev)))
344 return;
345
346 if (acpi_is_video_device(acpi_dev))
347 acpi_video_bus = acpi_dev;
348 else {
349 list_for_each_entry(acpi_cdev, &acpi_dev->children, node) {
350 if (acpi_is_video_device(acpi_cdev)) {
351 acpi_video_bus = acpi_cdev;
352 break;
353 }
354 }
355 }
356
357 if (!acpi_video_bus) {
358 printk(KERN_WARNING "No ACPI video bus found\n");
359 return;
360 }
361
362 list_for_each_entry(acpi_cdev, &acpi_video_bus->children, node) {
363 if (i >= 8) {
364 dev_printk (KERN_ERR, &dev->pdev->dev,
365 "More than 8 outputs detected\n");
366 return;
367 }
368 status =
369 acpi_evaluate_integer(acpi_cdev->handle, "_ADR",
370 NULL, &device_id);
371 if (ACPI_SUCCESS(status)) {
372 if (!device_id)
373 goto blind_set;
374 opregion->acpi->didl[i] = (u32)(device_id & 0x0f0f);
375 i++;
376 }
377 }
378
379end:
380 /* If fewer than 8 outputs, the list must be null terminated */
381 if (i < 8)
382 opregion->acpi->didl[i] = 0;
383 return;
384
385blind_set:
386 i = 0;
387 list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
388 int output_type = ACPI_OTHER_OUTPUT;
389 if (i >= 8) {
390 dev_printk (KERN_ERR, &dev->pdev->dev,
391 "More than 8 outputs detected\n");
392 return;
393 }
394 switch (connector->connector_type) {
395 case DRM_MODE_CONNECTOR_VGA:
396 case DRM_MODE_CONNECTOR_DVIA:
397 output_type = ACPI_VGA_OUTPUT;
398 break;
399 case DRM_MODE_CONNECTOR_Composite:
400 case DRM_MODE_CONNECTOR_SVIDEO:
401 case DRM_MODE_CONNECTOR_Component:
402 case DRM_MODE_CONNECTOR_9PinDIN:
403 output_type = ACPI_TV_OUTPUT;
404 break;
405 case DRM_MODE_CONNECTOR_DVII:
406 case DRM_MODE_CONNECTOR_DVID:
407 case DRM_MODE_CONNECTOR_DisplayPort:
408 case DRM_MODE_CONNECTOR_HDMIA:
409 case DRM_MODE_CONNECTOR_HDMIB:
410 output_type = ACPI_DIGITAL_OUTPUT;
411 break;
412 case DRM_MODE_CONNECTOR_LVDS:
413 output_type = ACPI_LVDS_OUTPUT;
414 break;
415 }
416 opregion->acpi->didl[i] |= (1<<31) | output_type | i;
417 i++;
418 }
419 goto end;
420}
421
422void intel_opregion_init(struct drm_device *dev)
423{
424 struct drm_i915_private *dev_priv = dev->dev_private;
425 struct intel_opregion *opregion = &dev_priv->opregion;
426
427 if (!opregion->header)
428 return;
429
430 if (opregion->acpi) {
431 if (drm_core_check_feature(dev, DRIVER_MODESET))
432 intel_didl_outputs(dev);
433
434 /* Notify BIOS we are ready to handle ACPI video ext notifs.
435 * Right now, all the events are handled by the ACPI video module.
436 * We don't actually need to do anything with them. */
437 opregion->acpi->csts = 0;
438 opregion->acpi->drdy = 1;
439
440 system_opregion = opregion;
441 register_acpi_notifier(&intel_opregion_notifier);
442 }
443
444 if (opregion->asle)
445 intel_opregion_enable_asle(dev);
446}
447
448void intel_opregion_fini(struct drm_device *dev)
449{
450 struct drm_i915_private *dev_priv = dev->dev_private;
451 struct intel_opregion *opregion = &dev_priv->opregion;
452
453 if (!opregion->header)
454 return;
455
456 if (opregion->acpi) {
457 opregion->acpi->drdy = 0;
458
459 system_opregion = NULL;
460 unregister_acpi_notifier(&intel_opregion_notifier);
461 }
462
463 /* just clear all opregion memory pointers now */
464 iounmap(opregion->header);
465 opregion->header = NULL;
466 opregion->acpi = NULL;
467 opregion->swsci = NULL;
468 opregion->asle = NULL;
469 opregion->vbt = NULL;
470}
471#endif
472
473int intel_opregion_setup(struct drm_device *dev)
474{
475 struct drm_i915_private *dev_priv = dev->dev_private;
476 struct intel_opregion *opregion = &dev_priv->opregion;
477 void *base;
478 u32 asls, mboxes;
479 int err = 0;
480
481 pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);
482 DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);
483 if (asls == 0) {
484 DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");
485 return -ENOTSUPP;
486 }
487
488 base = acpi_os_ioremap(asls, OPREGION_SIZE);
489 if (!base)
490 return -ENOMEM;
491
492 if (memcmp(base, OPREGION_SIGNATURE, 16)) {
493 DRM_DEBUG_DRIVER("opregion signature mismatch\n");
494 err = -EINVAL;
495 goto err_out;
496 }
497 opregion->header = base;
498 opregion->vbt = base + OPREGION_VBT_OFFSET;
499
500 opregion->lid_state = base + ACPI_CLID;
501
502 mboxes = opregion->header->mboxes;
503 if (mboxes & MBOX_ACPI) {
504 DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
505 opregion->acpi = base + OPREGION_ACPI_OFFSET;
506 }
507
508 if (mboxes & MBOX_SWSCI) {
509 DRM_DEBUG_DRIVER("SWSCI supported\n");
510 opregion->swsci = base + OPREGION_SWSCI_OFFSET;
511 }
512 if (mboxes & MBOX_ASLE) {
513 DRM_DEBUG_DRIVER("ASLE supported\n");
514 opregion->asle = base + OPREGION_ASLE_OFFSET;
515 }
516
517 return 0;
518
519err_out:
520 iounmap(base);
521 return err;
522}