drivers/staging/gma500/intel_opregion.c

   1 /*
   2  * Copyright 2010 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  * FIXME: resolve with the i915 version
  24  */
  25
  26 #include "psb_drv.h"
  27
  28 struct opregion_header {
  29         u8 signature[16];
  30         u32 size;
  31         u32 opregion_ver;
  32         u8 bios_ver[32];
  33         u8 vbios_ver[16];
  34         u8 driver_ver[16];
  35         u32 mboxes;
  36         u8 reserved[164];
  37 } __packed;
  38
  39 struct opregion_apci {
  40         /*FIXME: add it later*/
  41 } __packed;
  42
  43 struct opregion_swsci {
  44         /*FIXME: add it later*/
  45 } __packed;
  46
  47 struct opregion_acpi {
  48         /*FIXME: add it later*/
  49 } __packed;
  50
  51 int gma_intel_opregion_init(struct drm_device *dev)
  52 {
  53         struct drm_psb_private *dev_priv = dev->dev_private;
  54         u32 opregion_phy;
  55         void *base;
  56         u32 *lid_state;
  57
  58         dev_priv->lid_state = NULL;
  59
  60         pci_read_config_dword(dev->pdev, 0xfc, &opregion_phy);
  61         if (opregion_phy == 0)
  62                 return -ENOTSUPP;
  63
  64         base = ioremap(opregion_phy, 8*1024);
  65         if (!base)
  66                 return -ENOMEM;
  67
  68         lid_state = base + 0x01ac;
  69
  70         dev_priv->lid_state = lid_state;
  71         dev_priv->lid_last_state = readl(lid_state);
  72         return 0;
  73 }
  74
  75 int gma_intel_opregion_exit(struct drm_device *dev)
  76 {
  77         struct drm_psb_private *dev_priv = dev->dev_private;
  78         if (dev_priv->lid_state)
  79                 iounmap(dev_priv->lid_state);
  80         return 0;
  81 }