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/*

 * Copyright 2008 Intel Corporation 

 * Copyright 2008 Red Hat 

 *

 * 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, sub license, 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

 * NON-INFRINGEMENT.  IN NO EVENT SHALL INTEL AND/OR ITS SUPPLIERS 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.

 *

 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

//#include 

//#include 

//#include 

#include 

#include 

#include 

#include "i915_drv.h"

#include "intel_drv.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];

} __attribute__((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];

} __attribute__((packed));

/* OpRegion mailbox #2: SWSCI */

struct opregion_swsci {

       u32 scic;       /* SWSCI command|status|data */

       u32 parm;       /* command parameters */

       u32 dslp;       /* driver sleep time-out */

       u8 rsvd[244];

} __attribute__((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];

} __attribute__((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)

/* 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)

#define ACPI_OTHER_OUTPUT (0<<8)

#define ACPI_VGA_OUTPUT (1<<8)

#define ACPI_TV_OUTPUT (2<<8)

#define ACPI_DIGITAL_OUTPUT (3<<8)

#define ACPI_LVDS_OUTPUT (4<<8)

#ifdef CONFIG_ACPI

#endif

int intel_opregion_setup(struct drm_device *dev)

{

	struct drm_i915_private *dev_priv = dev->dev_private;

	struct intel_opregion *opregion = &dev_priv->opregion;

	void __iomem *base;

	u32 asls, mboxes;

	char buf[sizeof(OPREGION_SIGNATURE)];

	int err = 0;

	pci_read_config_dword(dev->pdev, PCI_ASLS, &asls);

	DRM_DEBUG_DRIVER("graphic opregion physical addr: 0x%x\n", asls);

	if (asls == 0) {

		DRM_DEBUG_DRIVER("ACPI OpRegion not supported!\n");

		return -ENOTSUPP;

	}

    base = ioremap(asls, OPREGION_SIZE);

	if (!base)

		return -ENOMEM;

	memcpy(buf, base, sizeof(buf));

	if (memcmp(buf, 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 = ioread32(&opregion->header->mboxes);

	if (mboxes & MBOX_ACPI) {

		DRM_DEBUG_DRIVER("Public ACPI methods supported\n");

		opregion->acpi = base + OPREGION_ACPI_OFFSET;

	}

	if (mboxes & MBOX_SWSCI) {

		DRM_DEBUG_DRIVER("SWSCI supported\n");

		opregion->swsci = base + OPREGION_SWSCI_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;

}