[deliverable/linux.git] / drivers / gpu / drm / gma500 / opregion.c

/*
 * Copyright 2011 Intel Corporation
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 */
#include <linux/acpi.h>
#include <linux/acpi_io.h>
#include "psb_drv.h"
#include "psb_intel_reg.h"

#define PCI_ASLE 0xe4
#define PCI_ASLS 0xfc

#define OPREGION_HEADER_OFFSET 0
#define OPREGION_ACPI_OFFSET   0x100
#define   ACPI_CLID 0x01ac /* current lid state indicator */
#define   ACPI_CDCK 0x01b0 /* current docking state indicator */
#define OPREGION_SWSCI_OFFSET  0x200
#define OPREGION_ASLE_OFFSET   0x300
#define OPREGION_VBT_OFFSET    0x400

#define OPREGION_SIGNATURE "IntelGraphicsMem"
#define MBOX_ACPI      (1<<0)
#define MBOX_SWSCI     (1<<1)
#define MBOX_ASLE      (1<<2)

struct opregion_header {
	u8 signature[16];
	u32 size;
	u32 opregion_ver;
	u8 bios_ver[32];
	u8 vbios_ver[16];
	u8 driver_ver[16];
	u32 mboxes;
	u8 reserved[164];
} __packed;

/* OpRegion mailbox #1: public ACPI methods */
struct opregion_acpi {
	u32 drdy;	/* driver readiness */
	u32 csts;	/* notification status */
	u32 cevt;	/* current event */
	u8 rsvd1[20];
	u32 didl[8];	/* supported display devices ID list */
	u32 cpdl[8];	/* currently presented display list */
	u32 cadl[8];	/* currently active display list */
	u32 nadl[8];	/* next active devices list */
	u32 aslp;	/* ASL sleep time-out */
	u32 tidx;	/* toggle table index */
	u32 chpd;	/* current hotplug enable indicator */
	u32 clid;	/* current lid state*/
	u32 cdck;	/* current docking state */
	u32 sxsw;	/* Sx state resume */
	u32 evts;	/* ASL supported events */
	u32 cnot;	/* current OS notification */
	u32 nrdy;	/* driver status */
	u8 rsvd2[60];
} __packed;

/* OpRegion mailbox #2: SWSCI */
struct opregion_swsci {
	/*FIXME: add it later*/
} __packed;

/* OpRegion mailbox #3: ASLE */
struct opregion_asle {
	u32 ardy;	/* driver readiness */
	u32 aslc;	/* ASLE interrupt command */
	u32 tche;	/* technology enabled indicator */
	u32 alsi;	/* current ALS illuminance reading */
	u32 bclp;	/* backlight brightness to set */
	u32 pfit;	/* panel fitting state */
	u32 cblv;	/* current brightness level */
	u16 bclm[20];	/* backlight level duty cycle mapping table */
	u32 cpfm;	/* current panel fitting mode */
	u32 epfm;	/* enabled panel fitting modes */
	u8 plut[74];	/* panel LUT and identifier */
	u32 pfmb;	/* PWM freq and min brightness */
	u8 rsvd[102];
} __packed;

/* ASLE irq request bits */
#define ASLE_SET_ALS_ILLUM     (1 << 0)
#define ASLE_SET_BACKLIGHT     (1 << 1)
#define ASLE_SET_PFIT          (1 << 2)
#define ASLE_SET_PWM_FREQ      (1 << 3)
#define ASLE_REQ_MSK           0xf

/* response bits of ASLE irq request */
#define ASLE_ALS_ILLUM_FAILED   (1<<10)
#define ASLE_BACKLIGHT_FAILED   (1<<12)
#define ASLE_PFIT_FAILED        (1<<14)
#define ASLE_PWM_FREQ_FAILED    (1<<16)

/* ASLE backlight brightness to set */
#define ASLE_BCLP_VALID                (1<<31)
#define ASLE_BCLP_MSK          (~(1<<31))

/* ASLE panel fitting request */
#define ASLE_PFIT_VALID         (1<<31)
#define ASLE_PFIT_CENTER (1<<0)
#define ASLE_PFIT_STRETCH_TEXT (1<<1)
#define ASLE_PFIT_STRETCH_GFX (1<<2)

/* response bits of ASLE irq request */
#define ASLE_ALS_ILLUM_FAILED	(1<<10)
#define ASLE_BACKLIGHT_FAILED	(1<<12)
#define ASLE_PFIT_FAILED	(1<<14)
#define ASLE_PWM_FREQ_FAILED	(1<<16)

/* ASLE backlight brightness to set */
#define ASLE_BCLP_VALID                (1<<31)
#define ASLE_BCLP_MSK          (~(1<<31))

/* ASLE panel fitting request */
#define ASLE_PFIT_VALID         (1<<31)
#define ASLE_PFIT_CENTER (1<<0)
#define ASLE_PFIT_STRETCH_TEXT (1<<1)
#define ASLE_PFIT_STRETCH_GFX (1<<2)

/* PWM frequency and minimum brightness */
#define ASLE_PFMB_BRIGHTNESS_MASK (0xff)
#define ASLE_PFMB_BRIGHTNESS_VALID (1<<8)
#define ASLE_PFMB_PWM_MASK (0x7ffffe00)
#define ASLE_PFMB_PWM_VALID (1<<31)

#define ASLE_CBLV_VALID         (1<<31)

static struct psb_intel_opregion *system_opregion;

static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct opregion_asle *asle = dev_priv->opregion.asle;
	struct backlight_device *bd = dev_priv->backlight_device;

	DRM_DEBUG_DRIVER("asle set backlight %x\n", bclp);

	if (!(bclp & ASLE_BCLP_VALID))
		return ASLE_BACKLIGHT_FAILED;

	if (bd == NULL)
		return ASLE_BACKLIGHT_FAILED;

	bclp &= ASLE_BCLP_MSK;
	if (bclp > 255)
		return ASLE_BACKLIGHT_FAILED;

	if (config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)) {
		int max = bd->props.max_brightness;
		gma_backlight_set(dev, bclp * max / 255);
	}

	asle->cblv = (bclp * 0x64) / 0xff | ASLE_CBLV_VALID;

	return 0;
}

void psb_intel_opregion_asle_intr(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct opregion_asle *asle = dev_priv->opregion.asle;
	u32 asle_stat = 0;
	u32 asle_req;

	if (!asle)
		return;

	asle_req = asle->aslc & ASLE_REQ_MSK;
	if (!asle_req) {
		DRM_DEBUG_DRIVER("non asle set request??\n");
		return;
	}

	if (asle_req & ASLE_SET_BACKLIGHT)
		asle_stat |= asle_set_backlight(dev, asle->bclp);

	asle->aslc = asle_stat;
}

#define ASLE_ALS_EN    (1<<0)
#define ASLE_BLC_EN    (1<<1)
#define ASLE_PFIT_EN   (1<<2)
#define ASLE_PFMB_EN   (1<<3)

void psb_intel_opregion_enable_asle(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct opregion_asle *asle = dev_priv->opregion.asle;

	if (asle && system_opregion ) {
		/* Don't do this on Medfield or other non PC like devices, they
		   use the bit for something different altogether */
		psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
		psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);

		asle->tche = ASLE_ALS_EN | ASLE_BLC_EN | ASLE_PFIT_EN
								| ASLE_PFMB_EN;
		asle->ardy = 1;
	}
}

#define ACPI_EV_DISPLAY_SWITCH (1<<0)
#define ACPI_EV_LID            (1<<1)
#define ACPI_EV_DOCK           (1<<2)


static int psb_intel_opregion_video_event(struct notifier_block *nb,
					  unsigned long val, void *data)
{
	/* The only video events relevant to opregion are 0x80. These indicate
	   either a docking event, lid switch or display switch request. In
	   Linux, these are handled by the dock, button and video drivers.
	   We might want to fix the video driver to be opregion-aware in
	   future, but right now we just indicate to the firmware that the
	   request has been handled */

	struct opregion_acpi *acpi;

	if (!system_opregion)
		return NOTIFY_DONE;

	acpi = system_opregion->acpi;
	acpi->csts = 0;

	return NOTIFY_OK;
}

static struct notifier_block psb_intel_opregion_notifier = {
	.notifier_call = psb_intel_opregion_video_event,
};

void psb_intel_opregion_init(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct psb_intel_opregion *opregion = &dev_priv->opregion;

	if (!opregion->header)
		return;

	if (opregion->acpi) {
		/* Notify BIOS we are ready to handle ACPI video ext notifs.
		 * Right now, all the events are handled by the ACPI video
		 * module. We don't actually need to do anything with them. */
		opregion->acpi->csts = 0;
		opregion->acpi->drdy = 1;

		system_opregion = opregion;
		register_acpi_notifier(&psb_intel_opregion_notifier);
	}
}

void psb_intel_opregion_fini(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct psb_intel_opregion *opregion = &dev_priv->opregion;

	if (!opregion->header)
		return;

	if (opregion->acpi) {
		opregion->acpi->drdy = 0;

		system_opregion = NULL;
		unregister_acpi_notifier(&psb_intel_opregion_notifier);
	}

	/* just clear all opregion memory pointers now */
	iounmap(opregion->header);
	opregion->header = NULL;
	opregion->acpi = NULL;
	opregion->swsci = NULL;
	opregion->asle = NULL;
	opregion->vbt = NULL;
}

int psb_intel_opregion_setup(struct drm_device *dev)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	struct psb_intel_opregion *opregion = &dev_priv->opregion;
	u32 opregion_phy, mboxes;
	void __iomem *base;
	int err = 0;

	pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy);
	if (opregion_phy == 0) {
		DRM_DEBUG_DRIVER("ACPI Opregion not supported\n");
		return -ENOTSUPP;
	}
	DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy);
	base = acpi_os_ioremap(opregion_phy, 8*1024);
	if (!base)
		return -ENOMEM;

	if (memcmp(base, OPREGION_SIGNATURE, 16)) {
		DRM_DEBUG_DRIVER("opregion signature mismatch\n");
		err = -EINVAL;
		goto err_out;
	}

	opregion->header = base;
	opregion->vbt = base + OPREGION_VBT_OFFSET;

	opregion->lid_state = base + ACPI_CLID;

	mboxes = opregion->header->mboxes;
	if (mboxes & MBOX_ACPI) {
		DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
		opregion->acpi = base + OPREGION_ACPI_OFFSET;
	}

	if (mboxes & MBOX_ASLE) {
		DRM_DEBUG_DRIVER("ASLE supported\n");
		opregion->asle = base + OPREGION_ASLE_OFFSET;
	}

	return 0;

err_out:
	iounmap(base);
	return err;
}
Commit	Line	Data
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 AC	24	#include <linux/acpi.h>
d839ede4 AC	25	#include <linux/acpi_io.h>
d839ede4 AC	26	#include "psb_drv.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
166973e5 AC	147	static struct psb_intel_opregion *system_opregion;
166973e5 AC	148
d839ede4 AC	149	static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
	150	{
	151	struct drm_psb_private *dev_priv = dev->dev_private;
	152	struct opregion_asle *asle = dev_priv->opregion.asle;
	153	struct backlight_device *bd = dev_priv->backlight_device;
d839ede4 AC	154
	155	DRM_DEBUG_DRIVER("asle set backlight %x\n", bclp);
	156
	157	if (!(bclp & ASLE_BCLP_VALID))
	158	return ASLE_BACKLIGHT_FAILED;
	159
	160	if (bd == NULL)
	161	return ASLE_BACKLIGHT_FAILED;
	162
	163	bclp &= ASLE_BCLP_MSK;
	164	if (bclp > 255)
	165	return ASLE_BACKLIGHT_FAILED;
	166
fcf92202 DC	167	if (config_enabled(CONFIG_BACKLIGHT_CLASS_DEVICE)) {
fcf92202 DC	168	int max = bd->props.max_brightness;
d112a816	169	gma_backlight_set(dev, bclp * max / 255);
fcf92202 DC	170	}
fcf92202 DC	171
d839ede4 AC	172	asle->cblv = (bclp * 0x64) / 0xff \| ASLE_CBLV_VALID;
	173
	174	return 0;
	175	}
	176
	177	void psb_intel_opregion_asle_intr(struct drm_device *dev)
	178	{
	179	struct drm_psb_private *dev_priv = dev->dev_private;
	180	struct opregion_asle *asle = dev_priv->opregion.asle;
	181	u32 asle_stat = 0;
	182	u32 asle_req;
	183
	184	if (!asle)
	185	return;
	186
	187	asle_req = asle->aslc & ASLE_REQ_MSK;
	188	if (!asle_req) {
	189	DRM_DEBUG_DRIVER("non asle set request??\n");
	190	return;
	191	}
	192
	193	if (asle_req & ASLE_SET_BACKLIGHT)
	194	asle_stat \|= asle_set_backlight(dev, asle->bclp);
	195
	196	asle->aslc = asle_stat;
	197	}
	198
	199	#define ASLE_ALS_EN (1<<0)
	200	#define ASLE_BLC_EN (1<<1)
	201	#define ASLE_PFIT_EN (1<<2)
	202	#define ASLE_PFMB_EN (1<<3)
	203
	204	void psb_intel_opregion_enable_asle(struct drm_device *dev)
	205	{
	206	struct drm_psb_private *dev_priv = dev->dev_private;
	207	struct opregion_asle *asle = dev_priv->opregion.asle;
	208
166973e5	209	if (asle && system_opregion ) {
d839ede4 AC	210	/* Don't do this on Medfield or other non PC like devices, they
	211	use the bit for something different altogether */
	212	psb_enable_pipestat(dev_priv, 0, PIPE_LEGACY_BLC_EVENT_ENABLE);
	213	psb_enable_pipestat(dev_priv, 1, PIPE_LEGACY_BLC_EVENT_ENABLE);
	214
	215	asle->tche = ASLE_ALS_EN \| ASLE_BLC_EN \| ASLE_PFIT_EN
	216	\| ASLE_PFMB_EN;
	217	asle->ardy = 1;
	218	}
	219	}
	220
	221	#define ACPI_EV_DISPLAY_SWITCH (1<<0)
	222	#define ACPI_EV_LID (1<<1)
	223	#define ACPI_EV_DOCK (1<<2)
	224
d839ede4 AC	225
	226	static int psb_intel_opregion_video_event(struct notifier_block *nb,
	227	unsigned long val, void *data)
	228	{
	229	/* The only video events relevant to opregion are 0x80. These indicate
	230	either a docking event, lid switch or display switch request. In
	231	Linux, these are handled by the dock, button and video drivers.
	232	We might want to fix the video driver to be opregion-aware in
	233	future, but right now we just indicate to the firmware that the
	234	request has been handled */
	235
	236	struct opregion_acpi *acpi;
	237
	238	if (!system_opregion)
	239	return NOTIFY_DONE;
	240
	241	acpi = system_opregion->acpi;
	242	acpi->csts = 0;
	243
	244	return NOTIFY_OK;
	245	}
	246
	247	static struct notifier_block psb_intel_opregion_notifier = {
	248	.notifier_call = psb_intel_opregion_video_event,
	249	};
	250
	251	void psb_intel_opregion_init(struct drm_device *dev)
	252	{
	253	struct drm_psb_private *dev_priv = dev->dev_private;
	254	struct psb_intel_opregion *opregion = &dev_priv->opregion;
	255
	256	if (!opregion->header)
	257	return;
	258
	259	if (opregion->acpi) {
	260	/* Notify BIOS we are ready to handle ACPI video ext notifs.
	261	* Right now, all the events are handled by the ACPI video
	262	* module. We don't actually need to do anything with them. */
	263	opregion->acpi->csts = 0;
	264	opregion->acpi->drdy = 1;
	265
	266	system_opregion = opregion;
	267	register_acpi_notifier(&psb_intel_opregion_notifier);
	268	}
d839ede4 AC	269	}
	270
	271	void psb_intel_opregion_fini(struct drm_device *dev)
	272	{
	273	struct drm_psb_private *dev_priv = dev->dev_private;
	274	struct psb_intel_opregion *opregion = &dev_priv->opregion;
	275
	276	if (!opregion->header)
	277	return;
	278
	279	if (opregion->acpi) {
	280	opregion->acpi->drdy = 0;
	281
	282	system_opregion = NULL;
	283	unregister_acpi_notifier(&psb_intel_opregion_notifier);
	284	}
	285
	286	/* just clear all opregion memory pointers now */
	287	iounmap(opregion->header);
	288	opregion->header = NULL;
	289	opregion->acpi = NULL;
	290	opregion->swsci = NULL;
	291	opregion->asle = NULL;
	292	opregion->vbt = NULL;
	293	}
	294
	295	int psb_intel_opregion_setup(struct drm_device *dev)
	296	{
	297	struct drm_psb_private *dev_priv = dev->dev_private;
	298	struct psb_intel_opregion *opregion = &dev_priv->opregion;
	299	u32 opregion_phy, mboxes;
d64363c7	300	void __iomem *base;
d839ede4 AC	301	int err = 0;
	302
	303	pci_read_config_dword(dev->pdev, PCI_ASLS, &opregion_phy);
	304	if (opregion_phy == 0) {
	305	DRM_DEBUG_DRIVER("ACPI Opregion not supported\n");
	306	return -ENOTSUPP;
	307	}
	308	DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy);
d839ede4	309	base = acpi_os_ioremap(opregion_phy, 8*1024);
d839ede4 AC	310	if (!base)
	311	return -ENOMEM;
	312
	313	if (memcmp(base, OPREGION_SIGNATURE, 16)) {
	314	DRM_DEBUG_DRIVER("opregion signature mismatch\n");
	315	err = -EINVAL;
	316	goto err_out;
	317	}
	318
	319	opregion->header = base;
	320	opregion->vbt = base + OPREGION_VBT_OFFSET;
	321
	322	opregion->lid_state = base + ACPI_CLID;
	323
	324	mboxes = opregion->header->mboxes;
	325	if (mboxes & MBOX_ACPI) {
	326	DRM_DEBUG_DRIVER("Public ACPI methods supported\n");
	327	opregion->acpi = base + OPREGION_ACPI_OFFSET;
	328	}
	329
	330	if (mboxes & MBOX_ASLE) {
	331	DRM_DEBUG_DRIVER("ASLE supported\n");
	332	opregion->asle = base + OPREGION_ASLE_OFFSET;
	333	}
	334
	335	return 0;
	336
	337	err_out:
	338	iounmap(base);
	339	return err;
	340	}
	341