drivers/staging/gma500/psb_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  */
  24
  25 #include "psb_drv.h"
  26
  27 struct opregion_header {
  28         u8 signature[16];
  29         u32 size;
  30         u32 opregion_ver;
  31         u8 bios_ver[32];
  32         u8 vbios_ver[16];
  33         u8 driver_ver[16];
  34         u32 mboxes;
  35         u8 reserved[164];
  36 } __attribute__((packed));
  37
  38 struct opregion_apci {
  39         /*FIXME: add it later*/
  40 } __attribute__((packed));
  41
  42 struct opregion_swsci {
  43         /*FIXME: add it later*/
  44 } __attribute__((packed));
  45
  46 struct opregion_acpi {
  47         /*FIXME: add it later*/
  48 } __attribute__((packed));
  49
  50 int psb_intel_opregion_init(struct drm_device *dev)
  51 {
  52         struct drm_psb_private *dev_priv = dev->dev_private;
  53         /*struct psb_intel_opregion * opregion = &dev_priv->opregion;*/
  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                 DRM_DEBUG("Opregion not supported, won't support lid-switch\n");
  63                 return -ENOTSUPP;
  64         }
  65         DRM_DEBUG("OpRegion detected at 0x%8x\n", opregion_phy);
  66
  67         base = ioremap(opregion_phy, 8*1024);
  68         if (!base)
  69                 return -ENOMEM;
  70
  71         lid_state = base + 0x01ac;
  72
  73         DRM_DEBUG("Lid switch state 0x%08x\n", *lid_state);
  74
  75         dev_priv->lid_state = lid_state;
  76         dev_priv->lid_last_state = *lid_state;
  77         return 0;
  78 }