Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / gpu / drm / gma500 / gma_device.c
1 /**************************************************************************
2  * Copyright (c) 2011, Intel Corporation.
3  * All Rights Reserved.
4  *
5  * This program is free software; you can redistribute it and/or modify it
6  * under the terms and conditions of the GNU General Public License,
7  * version 2, as published by the Free Software Foundation.
8  *
9  * This program is distributed in the hope it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
12  * more details.
13  *
14  **************************************************************************/
15
16 #include <drm/drmP.h>
17 #include "psb_drv.h"
18
19 void gma_get_core_freq(struct drm_device *dev)
20 {
21         uint32_t clock;
22         struct pci_dev *pci_root = pci_get_bus_and_slot(0, 0);
23         struct drm_psb_private *dev_priv = dev->dev_private;
24
25         /*pci_write_config_dword(pci_root, 0xD4, 0x00C32004);*/
26         /*pci_write_config_dword(pci_root, 0xD0, 0xE0033000);*/
27
28         pci_write_config_dword(pci_root, 0xD0, 0xD0050300);
29         pci_read_config_dword(pci_root, 0xD4, &clock);
30         pci_dev_put(pci_root);
31
32         switch (clock & 0x07) {
33         case 0:
34                 dev_priv->core_freq = 100;
35                 break;
36         case 1:
37                 dev_priv->core_freq = 133;
38                 break;
39         case 2:
40                 dev_priv->core_freq = 150;
41                 break;
42         case 3:
43                 dev_priv->core_freq = 178;
44                 break;
45         case 4:
46                 dev_priv->core_freq = 200;
47                 break;
48         case 5:
49         case 6:
50         case 7:
51                 dev_priv->core_freq = 266;
52                 break;
53         default:
54                 dev_priv->core_freq = 0;
55         }
56 }